| Satin Fiber Composition | Polyester satin, recycled polyester satin, or silk satin with composition clearly stated | Request fiber-content test reports and confirm that the product description, packaging, and customs documents use the same composition. | Satin describes the weave or surface structure, not necessarily the fiber. Fiber composition affects price, care, softness, durability, and labeling requirements. | High |
| Fabric Weight | Approximately 80–140 g/m² for lightweight satin sleep-mask shells | Confirm fabric weight through a laboratory report or production sample, and specify an acceptable tolerance in the purchase agreement. | Fabric weight influences opacity, drape, comfort, sewing stability, and perceived quality. | Medium |
| Mask Dimensions | Common adult size: approximately 19–22 cm wide and 8–10 cm high | Check the finished dimensions after sewing, including seam allowance, elastic attachment, nose contour, and dimensional tolerance. | A suitable shape should cover light without creating excessive pressure or gaps around the nose and cheeks. | High |
| Elastic Strap Construction | Soft covered elastic with adjustable or size-appropriate tension; no exposed sharp hardware | Inspect recovery after repeated stretching, attachment strength, edge comfort, and whether the strap leaves pressure marks during extended wear. | The strap is a major source of customer complaints, especially when tension is inconsistent between batches. | High |
| Light-Blocking Performance | Full facial coverage with minimal light leakage under normal indoor and travel conditions | Use a repeatable inspection method with a fixed light source, test multiple samples, and assess leakage around the nose bridge and lower edge. | Light blocking is the primary functional requirement of a sleep mask and should not be judged only from product photographs. | High |
| Colorfastness | Testing against applicable ISO or AATCC colorfastness methods; no visible staining or unacceptable shade change after care testing | Request test conditions for washing, rubbing, perspiration, and water exposure. Match approved color standards with production lots. | Color transfer and fading can damage customer trust and may create claims when the mask contacts skin, bedding, or clothing. | High |
| Chemical Safety | Materials suitable for skin contact and compliant with the destination market's restricted-substance requirements | Ask for current laboratory reports covering relevant restricted substances, dyes, heavy metals, formaldehyde, and other applicable requirements. | Compliance obligations vary by destination. A generic safety declaration is not equivalent to an independent test report. | High |
| OEKO-TEX or Equivalent Textile Certification | Valid certification for the actual fabric or finished product, where required by the buyer's market | Verify certificate scope, product class, validity period, certificate holder, and whether the supplied material is covered. | Certification can support chemical-safety claims, but its scope must match the exact material and product being purchased. | Medium |
| Quality Management System | Documented incoming inspection, in-process inspection, final inspection, and corrective-action procedures | Review inspection checklists, defect classifications, sample-retention practices, and batch traceability records. | A documented system is more reliable than a visual factory tour or a general claim of “strict quality control.” | High |
| Defect-Control Method | Clearly defined acceptance criteria for stains, snags, loose threads, seam puckering, broken stitches, and uneven elastic | Agree on approved samples, critical defects, major defects, minor defects, inspection level, and acceptable quality limits before production. | Written criteria reduce disputes and make inspection results consistent across suppliers and shipment lots. | High |
| Customization Capability | Custom color, size, label, packaging, embroidery, printing, and fabric options supported with pre-production approval | Request a development timeline, artwork requirements, sample charges, color-matching process, and confirmation of minimum order quantities. | Customization affects development risk, lead time, packaging compliance, and total landed cost. | Medium |
| Sampling Process | Pre-production sample, revised sample when necessary, and signed or digitally approved reference sample | Confirm sample lead time, sample-to-bulk consistency controls, and whether the approved sample is retained for final inspection. | A documented approval sample provides an objective reference for workmanship, color, dimensions, and materials. | High |
| Typical Production Lead Time | Approximately 15–30 calendar days after approval for standard repeat orders; longer for custom materials | Separate material procurement, sample approval, production, inspection, packing, and export-document timelines. | Quoting only a sewing time can produce unrealistic delivery promises and stock-out risk. | Medium |
| Minimum Order Quantity | Often lower for stock fabric and standard construction; higher for custom fabric, custom dyeing, or special packaging | Obtain separate MOQs for each color, size, logo method, packaging format, and material type. Confirm whether mixed-color orders are allowed. | MOQ is a commercial condition, not a fixed industry standard, and can change substantially with customization. | High |
| Packaging and Retail Readiness | Individually protected, clean, moisture-controlled packaging with compliant labels and carton markings | Approve packaging artwork, product dimensions, language requirements, barcode placement, carton quantity, and drop-test expectations where applicable. | Packaging affects hygiene, presentation, warehouse handling, shipping efficiency, and marketplace compliance. | Medium |
| Export Documentation | Commercial invoice, packing list, transport documents, origin information, and product-specific compliance documents when required | Check document accuracy, HS-code support, country-of-origin details, carton marks, and the supplier's ability to meet the destination market's requirements. | Correct documentation helps prevent customs delays, classification problems, and avoidable landed-cost changes. | High |
| Sustainability Evidence | Traceable recycled content or responsible-material documentation when sustainability claims are made | Request transaction certificates, chain-of-custody records, recycled-content evidence, and precise claim wording for packaging and marketing. | Environmental claims should be supported by evidence and should not imply broader certification than the documentation covers. | Medium |
| Supplier Communication | Written responses within one business day during sampling and production-management stages | Evaluate technical English, response completeness, escalation procedures, change-control discipline, and reporting of delays or defects. | Fast and accurate communication reduces specification errors and improves response time when production issues occur. | Medium |
| Pre-Shipment Inspection | Independent or buyer-authorized inspection before shipment, based on agreed sampling and defect criteria | Specify inspection timing, sample size, measurement points, functional checks, packaging checks, and the action required if results fail. | Inspection before shipment provides a final opportunity to identify defects before international freight is released. | High |
| Commercial Evaluation | Compare total landed cost rather than unit price alone | Include product price, sampling, tooling, packaging, testing, inspection, freight, duties, payment terms, defect allowance, and replacement policy. | The lowest quoted unit price may not provide the lowest total cost after compliance, logistics, and quality risks are included. | High |
