150 x 200 cm grey fleece picnic blanket on cutting table with concealed zipper pocket opened to show seam construction, zipper tape and measurement references

Define the pocket risk before discussing style

For this product, the blanket body is usually easy to control; the concealed pocket is where repeat failures occur. The rigid zipper line interrupts a soft brushed surface, so even 8-10 mm position drift can read clearly once the blanket is folded, stacked and viewed under retail or event handout conditions. Common rejectable faults are zipper waviness, pocket opening not parallel to finished edges, seam grin-through on the face, pile trapped in the coil, skew under the fold line, and local print distortion around the slit opening.

Use the term hidden pocket operationally, not loosely. For a fleece picnic blanket, hidden pocket should mean a concealed nylon-coil zipper inserted into a slit opening on the blanket face or back face, with the pocket bag hidden inside the panel and no external patch pocket visible when the zipper is closed. If you want reverse-entry from the back, or a pocket bag hanging off the perimeter seam, write that explicitly because suppliers interpret hidden pocket differently.

Treat pocket geometry as a controlled dimensional feature. Blanket finished size and pocket location need separate tolerances on the PO. For a 240 gsm single-layer polar fleece blanket, the most workable basis is ex-factory measurement after 24 hours relaxation in standard atmosphere, with post-wash retention called out separately. Measure all pocket coordinates from finished sewn edges, never from raw cut edges.

If you need adjacent product references rather than general editorial reading, use `/blog/230gsm-rpet-fleece-picnic-blankets-with-fold-out-phone-pockets-pocket-.html` for pocket-volume logic, `/blog/190t-polyester-shell-picnic-blankets-with-100gsm-needle-punched-fillin.html` for fold-pack interaction with quilting bulk, and `/blog/tpu-laminated-190gsm-suede-finish-picnic-mats-hydrostatic-resistance-s.html` if the program later migrates from soft event blanket to moisture-barrier outdoor mat construction.

Mandatory specification matrix for RFQ and PO

Below is the level of detail that should be frozen before quotation. If these items are left open, price comparisons between suppliers are not meaningful because fabric yield, sewing minutes, zipper cost and carton density all move.

Product type: single-layer polar fleece picnic blanket; nominal finished size 150 x 200 cm; target finished mass 240 gsm. Fibre content: 100% polyester unless recycled content is claimed separately. One-way nap required on all cut panels. Hidden pocket construction: concealed nylon-coil zipper slit pocket with woven pocket bag inside panel.

Recommended buyer-facing matrix: finished size 1500 x 2000 mm; ex-factory tolerance ±20 mm on width and ±25 mm on length after 24 hour relaxation; target GSM 240 with shipment average 240 ±5% and any individual panel 240 ±7%; edge finish option A 3-thread or 4-thread overlock at 8-11 SPI, option B bound edge at 7-9 SPI lockstitch plus binder wrap; pocket opening length 170 mm nominal with ±3 mm tolerance; usable pocket depth 180 mm nominal with ±5 mm tolerance; pocket opening placement from corner reference point X = 110 mm from short finished edge and Y = 120 mm from long finished edge unless artwork forces another location; placement tolerance ±5 mm only if template-guided process is approved, otherwise agree ±8 mm; zipper type 3# concealed nylon coil standard or 5# concealed nylon coil for heavier phone-load use; stitch density at zipper insertion 9-11 SPI; fold size target 380 x 250 x 55 mm for 3# zipper build or about 380 x 250 x 60 mm for 5# zipper build, subject to actual folding map; unit pack one piece in polybag or belly band; carton quantity commonly 20-24 pieces; recommended carton gross weight ceiling 12-15 kg for manual handling.

State what is requirement and what is guidance. Mandatory requirements belong in the PO and PPS. Guidance items, such as preferred corner location or whether 3# zipper is adequate for cards-only use, belong in sourcing notes until frozen. Mixing the two creates predictable disputes at final inspection.

For adjacent product construction choices, `/blog/220gsm-polyester-polar-fleece-blankets-with-self-fabric-carry-loops-lo.html` is useful if a carry loop is added, and `/blog/foldable-picnic-mats-with-velcro-flap-and-webbing-handle-size-stitchin.html` is useful if the blanket later converts into a folded carry format with a fixed flap and handle.

Tolerance table buyers can paste into a tech pack

Use one tolerance table with target, tolerance, test method, sampling point and reject trigger. A practical version for this product is as follows.

Finished width: target 1500 mm, tolerance ±20 mm, measure after 24 hour relaxation under standard atmosphere using a steel tape on a flat table, sampling at top, middle and bottom cross-lines, reject any unit outside tolerance. Finished length: target 2000 mm, tolerance ±25 mm, same conditioning and method, sampling at left, centre and right length lines, reject any unit outside tolerance. GSM: target 240 gsm, shipment average 240 ±5%, any individual test specimen 240 ±7%; test by ISO 3801 or equivalent mass per unit area method after conditioning to ISO 139 atmosphere; sample from body panel away from pocket and edge by at least 100 mm; reject lot if shipment average or individual limits fail the agreed sampling rule.

Pocket opening length: target 170 mm ±3 mm measured along zipper chain centreline, reject if shorter than 167 mm or longer than 173 mm. Pocket depth: target 180 mm ±5 mm measured from opening seam to bottom of pocket bag at centre, reject if usable depth is below 175 mm. Pocket placement: X and Y coordinates from finished corner reference, tolerance ±5 mm with approved template process or ±8 mm without approved process; reject any unit outside the agreed basis. Parallelism of opening to nearest finished edge: max deviation 3 mm over full opening length, reject if visually skewed and measured deviation exceeds 3 mm.

Folded pack size: target 380 x 250 x 55 mm for approved 3# sample, tolerance ±10 mm on length and width and +8/-5 mm on thickness after 2 hours relaxation from folding; reject if it exceeds approved master sample pack size enough to break carton count. Zipper operation: slider must run smoothly for 10 open-close cycles on initial inspection and 50 cycles on pre-production durability check without tooth disengagement, slider failure, severe pile trapping or seam burst. Stitch density at zipper seam: 9-11 SPI lockstitch, reject if below 8 SPI or if skipped stitches exceed agreed defect count. Perimeter overlock density: 8-11 SPI, reject if loose loops, missed bite or raw edge exposure is visible longer than 10 mm.

These tolerances are not universal. The tighter pocket tolerance only holds where fleece spreading is stable, panel marking is template-based, zipper insertion is guide-controlled, and first-off approval is enforced. On freehand cut-and-sew with unstable brushed fleece, promising ±5 mm is not credible. Buyers should tie the tolerance directly to process controls in the PPS approval record.

Measurement basis, conditioning and post-wash retention

Buyers need to separate three claim types: ex-factory appearance and size, post-relaxation size, and post-laundering retention. If that distinction is missing, a supplier may meet the inspection table ex-factory but not after washing.

For ex-factory dimensional inspection, condition finished blankets for about 24 hours in standard textile atmosphere aligned with ISO 139 before measurement. Lay flat without stretching. Measure finished dimensions between outermost sewn edges. If the perimeter is overlocked, define the measurement line as the visible finished edge, not the overlock needle penetration line. Pocket coordinates are measured from the same finished edge reference system.

For wash retention, specify the laundering protocol separately. A workable buyer requirement for this category is ISO 6330 home laundering on agreed cycle and drying method, then dimensional change assessed using ISO 5077 principles. For a single-layer 240 gsm polyester fleece blanket, many buyers set post-wash dimensional change at not more than about ±3% in length or width after one agreed wash cycle, with pocket seam integrity and zipper operation still passing after laundering. If the item is event merchandise and not sold with durability claims, some buyers only require ex-factory tolerance plus one wash appearance review; that should be written clearly.

For colourfastness, do not rely on visual comments only. Where solid shades or prints matter, set wash fastness to ISO 105-C06 at an agreed severity, rubbing fastness to ISO 105-X12, and if the blanket is used outdoors with exposed branding, light fastness to ISO 105-B02 can be added. Relevant background sits in `/blog/iso-105-c06-wash-fastness-testing-for-black-280gsm-coral-fleece-throws.html`, `/blog/iso-105-x12-rubbing-fastness-for-red-300gsm-flannel-fleece-throws-dry-.html`, and `/blog/iso-105-b02-light-fastness-for-printed-200gsm-beach-throws-uv-exposure.html`.

Print methods near the pocket zone and their different risks

Decoration needs to be specified because the pocket slit interacts differently with each print method. Screen printing on fleece can leave a heavier local ink deposit, reducing recoverability and making the zipper line read harder through the face. Heat transfer can produce a stiff patch with sharper edge memory, especially if the transfer overlaps the seam allowance zone. Sublimation works only on light or white polyester grounds and generally keeps the softest hand, but registration relative to the slit still matters. Embroidery near the hidden pocket is usually the highest-risk option because backing, thread build and local perforation increase puckering and seam show.

A useful starting clearance is at least 20 mm from any print edge to the zipper seam zone for light one-colour screen prints on stable fleece, and 25-30 mm for heavier print deposits, dark shades, heat transfer films or 5# zippers. If artwork must cross the pocket area, require an actual process sample showing print first, zipper insertion second, and the final folded presentation. Artwork approval alone is not enough.

For sublimation on pale polyester fleece, watch ghosting and slit registration after heat exposure. For screen print, watch for ink cracking at the slit edges and hard handle telegraphing under compression. For transfer print, watch local shrink differential and adhesive edge show. Decoration method comparison can be paired with `/blog/custom-blanket-decoration-methods.html`, while sublimation-specific considerations are covered in `/blog/digital-sublimation-printing-on-280gsm-flannel-fleece-artwork-moq-and-.html`.

Seam bulk, zipper choice and cost-direction trade-offs

Seam bulk drives three things at once: face appearance, zipper running and packing density. At the slit opening, the construction often stacks fleece face, seam turn-back, zipper tape and pocket bag, creating four to six layers. If that bulk lands on the primary fold line, the folded pack swells and the zipper line remains visible after unpacking.

A low-bulk standard build is 3# concealed nylon coil zipper, lightweight polyester taffeta or pongee pocketing around 55-75 gsm and 50D-75D, lockstitch insertion at 9-11 SPI, pocket-bag seam allowance 8-10 mm, trimmed clean, with compact end reinforcement. This is usually the best starting point for event or promotional blankets where the pocket holds keys, cards or a slim phone.

A 5# concealed nylon coil is more tolerant of repeated opening and thicker phone cases, but it adds tape width and local stack height. In practice, moving from 3# to 5# usually adds a small unit-cost increase from zipper and sewing time and can add roughly 3-5 mm to local folded thickness, depending on pocket bag and fold map. Binding the blanket edge instead of overlock often adds cleaner appearance and better repeated-laundry resilience, but it increases labour minutes, corner bulk and edge-feed sensitivity. Coated pocketing can improve moisture resistance slightly, but it usually feels crisper and prints through more under compression than uncoated pocketing.

If buyers need directional cost logic, use simple terms in the RFQ: overlock is the lowest-cost perimeter finish; bound edge is a mid-cost upgrade; 3# zipper is lower cost and flatter; 5# zipper is more robust but bulkier; uncoated pocketing is softer and easier to sew; lightly coated pocketing adds some moisture resistance but raises stiffness risk. Exact deltas vary by order size, zipper source and labour line efficiency, so treat them as directional, not fixed numbers.

For nearby constructions with heavier backing or more outdoor use, compare `/blog/210d-nylon-ripstop-picnic-blankets-with-60gsm-polyester-padding-quilti.html`, `/blog/900d-polyester-picnic-blankets-with-pvc-free-tpe-backing-cold-crack-re.html`, and `/blog/picnic-blanket-backing-peva-pu-tpu.html`.

Packing math: how pocket bulk changes fold size and carton count

Fold dimensions should be approved from a real sample, not guessed from blanket area alone. The hidden pocket changes local thickness distribution, especially if the zipper sits near the first or second fold line. That can reduce carton count even if blanket size and GSM stay unchanged.

Worked example A, lower-bulk build: 150 x 200 cm blanket, 240 gsm fleece, single layer, 3# concealed zipper, 60 gsm 50D pocketing, overlock edge. Blanket fabric mass is about 7.2 square metres x 240 gsm = roughly 720 g. Add zipper, sewing thread, care label and pocket bag, and the unit net weight often lands around 760-810 g depending on actual cut yield and trim. With a fold map producing about 380 x 250 x 55 mm after 2 hours relaxation, a carton internal size around 52 x 40 x 42 cm can typically hold 20 pieces in a practical stack pattern, subject to carton board grade and compression allowance. Gross weight usually stays in a manageable band if outer carton and polybags are controlled.

Worked example B, bulkier build: same blanket body, but 5# zipper, 75 gsm pocketing, bound edge and pocket aligned closer to a fold ridge. Unit net weight may rise only modestly, but folded thickness can move from about 55 mm to around 60-63 mm. That seemingly small increase often reduces the same carton from 20 pieces to 16-18 pieces or forces a taller carton, which affects pallet height and freight efficiency.

Set carton test expectations if the program is shipped through parcel or mixed distribution. A common buyer requirement is carton drop verification and stacking/compression review on the approved pack-out. The exact method varies by channel, but at minimum define master carton dimensions, corrugate grade, gross weight ceiling, inner pack count, and whether the folded blanket must recover appearance after carton compression. Related logistics references include `/blog/custom-blanket-lead-times-shipping.html`, `/blog/cif-hamburg-costing-for-150x180cm-260gsm-fleece-throws-palletization-h.html`, and `/blog/ddp-uk-costing-for-260gsm-brushed-polar-fleece-blankets-with-printed-b.html`.

Inspection method: numeric lot acceptance, not narrative QC

Use a defined lot-acceptance rule. For a normal shipment inspection under ANSI ASQ Z1.4 or equivalent single-sampling practice, many buyers run General Inspection Level II with AQL 2.5 for major defects and AQL 4.0 for minor defects, with zero tolerance for critical defects. For a lot of 3,201 to 10,000 pieces, the common sample size code letter at General Level II often leads to 200 pieces sampled; buyers should confirm the exact table used by their inspection company and state it on the PO.

A practical defect classification for this product is: critical defects, acceptance 0, reject 1; major defects, AQL 2.5; minor defects, AQL 4.0. Critical defects include broken needle contamination if needle control fails, sharp trim or zipper component causing injury risk, gross mislabelling by market, or prohibited chemical non-compliance on agreed restricted substances. Major defects include finished size outside tolerance, wrong GSM outside agreed limit, pocket placement outside tolerance, zipper failure during operation check, obvious zipper waviness visible at about 1 m, print misregistration near pocket, severe seam grin-through, open seam, major shade variation, or folded pack not fitting approved carton plan. Minor defects include light face impression visible only at close inspection, minor loose threads, slight skew within tolerance, or small measurement drift that does not exceed the reject trigger.

If using the widely adopted 200-piece sample under AQL 2.5 and 4.0, the acceptance and rejection numbers depend on the table version used by the inspecting body, so do not hard-code them casually unless your organisation controls the table. If your business prefers fixed custom numbers instead of table look-up, state them plainly, for example: on a 200-piece sample, critical Ac 0 Re 1, major Ac 10 Re 11, minor Ac 14 Re 15. If you choose custom numbers, say they override standard-table interpretation.

Reinspection rules should also be numeric. A workable rule is: any failed final inspection requires either 100% rework and reinspection at supplier cost, or a second random inspection on a newly presented lot only after documented corrective action. Do not allow cherry-picked replacement of only sampled cartons. Pair the acceptance rule with an in-line first-50 check and mid-line audit. For adjacent QC frameworks, see `/blog/aql-2-5-inspection-checklist-for-200gsm-coral-fleece-promotional-blank.html` and `/blog/blanket-quality-control-inspection.html`.

Inspection points and reference language for tech packs

Buyers reduce disputes by giving a simple coordinate system. Use the top-left finished corner of the inspection face as origin point 0,0. X runs along the short side, Y along the long side. State whether measurements are taken on face side or back side and whether the zipper opening is horizontal or vertical relative to the long side.

Example callout language: pocket opening centreline located at X 110 mm, Y 120 mm from finished corner A; zipper opening length 170 mm measured along chain centreline; pocket depth 180 mm measured perpendicular from opening midpoint to pocket bag bottom; nearest pocket seam must sit no closer than 40 mm to the finished perimeter edge; opening parallelism to short edge maximum deviation 3 mm over full length. This language is easier to inspect than vague notes such as near corner or hidden pocket as approved sample.

State visual standards in prose so inspectors can score appearance consistently. Acceptable zipper waviness means no visible undulation at 1 m under standard indoor light on a laid-flat relaxed sample. Rejectable zipper waviness means the opening line snakes visibly or causes a fold ridge that remains after 2 hours relaxation. Acceptable pile trapping means no trapped fibres that impede opening through 10 cycles. Rejectable pile trapping means repeated snagging, forced slider movement or visible jam tendency. Rejectable grin-through means seam allowance shadow or tape outline visible from 1 m on the display face. Rejectable skew means the folded blanket presents visibly out of square or the pocket line reads off-axis against the perimeter edge.

If the supplier prepares inspection sheets in-house, make them record actual numbers rather than pass or fail only: width, length, GSM, X position, Y position, opening length, depth, folded size, zipper cycle result and carton gross weight. That creates a usable trace if a shipment dispute arises later.

First-off approval template and failure-mode checklist

Before bulk cutting, require a first-off or first-50 approval record. At minimum, the template should log fabric batch, measured GSM, nap direction confirmation, zipper specification, pocketing fabric specification, actual pocket coordinates, actual opening length and depth, seam SPI, fold-pack size, carton fit check and operator or line ID. If the pocket is close to decoration, include printed-panel check before zipper insertion and final assembled check after insertion.

Use a short failure-mode checklist during PPS and first-50 review: pocket drift beyond tolerance; zipper tape twisting; slider snag from trapped pile; seam pucker after 2 hours relaxation; grin-through on face; zipper end reinforcement telegraphing; fold bulk over target; print hardening at seam zone; mixed nap direction; pocket bag too shallow for claimed contents; edge curl causing off-square appearance; excessive loose fibres contaminating coil; carton count failing because fold thickness is above approved sample. This checklist is more useful to buyers than broad comments such as workmanship acceptable.

Where packaging claims contents or performance, test the actual claim. If the pack says phone pocket, define the phone envelope. If it says recycled polyester, ask for transaction documents aligned with the claim scope. If it says water-resistant pocket, specify whether that refers only to pocketing fabric or to the assembled seam, because a stitched zipper slit is not waterproof. For recycled-claim workflow, buyers can align with `/blog/rpet-polar-fleece-blankets-with-grs-certification-documentation-buyers.html` or `/blog/grs-transaction-certificate-workflow-for-250gsm-rpet-sherpa-throws-lot.html`.

Compliance and declarations buyers should not leave implied

Even a simple fleece picnic blanket should carry basic market declarations where relevant. For EU-facing product, buyers often ask for REACH Annex XVII conformity on dyes, prints and trims, especially zipper components, colourants and any coated pocketing. For US youth-oriented or children's programs, CPSIA tracking and substrate-specific chemical review may apply depending on age grading and claims. Azo dye and formaldehyde expectations should be written if the customer has internal limits rather than relying on generic supplier assurances.

If recycled content is claimed, require that the claim language on packaging matches what the supplier can document. For example, do not print recycled blanket unless the fabric source and transaction paperwork support the claim chain. If no recycled claim is intended, state 100% polyester or the actual blend clearly and avoid casual sustainability language. Relevant buyer references include `/blog/textile-certifications-explained-buyers.html`, `/blog/reach-annex-xvii-checks-for-210d-pu-coated-picnic-mats-restricted-subs.html`, and `/blog/cpsia-tracking-labels-for-240gsm-printed-coral-fleece-kids-blankets-ba.html`.

Care labels should also be set deliberately. Use ISO 3758 symbols appropriate to the agreed laundering basis, and align washing guidance with the durability claims you actually tested. If the product is not intended for industrial laundry, do not allow the pack copy to imply it. General care guidance can be paired with `/blog/blanket-care-washing-guide.html`.

What buyers should lock before bulk release

Bulk release should not happen until these items are signed: approved construction matrix; measurement drawing with X-Y pocket coordinates; approved edge finish; zipper size and supplier; pocketing spec including gsm or denier range; decoration method and clearance to slit zone; one-way nap instruction; fold map; unit pack method; carton quantity and gross-weight limit; acceptance plan; wash-retention requirement; and market compliance declarations.

For most event or promotional programs, this level of control is enough to prevent the usual surprises: the pocket shifting visibly, the print cracking around the slit, or the carton count dropping because the folded pack is thicker than assumed. The point is not to over-engineer a simple fleece blanket; it is to define the small construction features that create most claims if left vague.

Frequently asked

What should hidden pocket mean on a fleece picnic blanket? State it explicitly. For this product, hidden pocket should mean a concealed nylon-coil zipper inserted into a slit opening, with the pocket bag hidden inside the blanket panel and no visible external patch pocket when closed. If you want reverse entry from the back or a pocket bag caught into the edge seam, write that construction instead of using hidden pocket as a loose term.

Is pocket placement tolerance of ±5 mm realistic? Yes, but only under controlled production conditions. It is realistic where fleece spreading is stable, panels are template-marked, zipper insertion uses guides or jigs, and first-off approval is enforced. Without those controls, a looser tolerance such as ±8 mm is more credible for brushed fleece cut-and-sew production.

Do the size tolerances apply before washing or after washing? They should be separated. Ex-factory size tolerance is usually measured after about 24 hours relaxation in standard textile atmosphere. Post-wash retention should be specified separately using an agreed laundering method, such as ISO 6330 with dimensional change assessed by ISO 5077 principles.

Which zipper is better for this blanket, 3# or 5#? For cards, keys and slim-phone use, a 3# concealed nylon coil is usually the flatter and lower-cost option. For repeated opening, thicker phone cases or heavier pocket loads, a 5# coil is more robust but adds seam bulk, local fold thickness and a small cost increase.

What print method is lowest risk near the pocket? On light polyester fleece, sublimation usually keeps the softest hand and lowest added seam-zone stiffness. Screen print and heat transfer both increase local hardness and can make the zipper line read more strongly if placed too close. Embroidery near the slit is normally the highest-risk option for puckering and grin-through.

What is a workable lot-acceptance method for this item? A common approach is ANSI ASQ Z1.4 or equivalent, General Inspection Level II, with zero tolerance for critical defects, AQL 2.5 for major defects and AQL 4.0 for minor defects. For many lot sizes this leads to a 200-piece sample, but the exact sample code and acceptance numbers should be stated on the PO or inspection protocol.

What are the most common rejectable defects on concealed-pocket fleece blankets? The main ones are pocket drift outside tolerance, zipper waviness visible at about 1 metre, seam grin-through on the display face, pile trapped in the coil, zipper failure during cycling, print distortion or cracking at the slit zone, mixed nap direction, and folded pack thickness exceeding the approved carton plan.

What should buyers specify for compliance? At minimum, define the fibre-content claim, care labelling basis, and any market chemical expectations on fabric, print and trims. If recycled content is claimed, match the packaging language to documentable transaction records. For EU and US programs, REACH, azo and formaldehyde expectations, and CPSIA-related controls where applicable, should not be left implied.

Have a project in mind? Send us your spec — we'll reply within one business day with indicative pricing and a sample plan.

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