Choosing an OEM sportswear manufacturer involves more than comparing unit prices. A factory that can quote for a jersey may not be the right partner for a private-label collection, a repeat teamwear programme or garments that require consistent sizing and technical performance. Buyers should assess production capability, samples, quality checks, communication and the full commercial scope before approving bulk manufacturing.
This guide is written for sportswear brands, teamwear suppliers, clubs, academies and purchasing teams sourcing custom apparel. Use it to shortlist suppliers, prepare meaningful requests for quotation and identify risks before production.
1. Define the garment and its intended use
A soccer jersey, rugby top, training T-shirt and compression base layer can have different needs for textile construction, patterns, fit, seams and testing. Start with a clear written specification rather than expecting manufacturers to quote for a loosely defined “premium kit.”
- Identify the products, target users and intended sport or activity.
- Provide the planned order quantity, size mix and available size chart.
- Describe fibre composition, knit structure, target GSM, stretch, opacity and care requirements.
- Specify logos, colours, personalisation, labelling and packaging.
- State the intended country of sale, order deadline and whether repeat production is expected.
Our existing OEM sports apparel manufacturing guide explains the wider development-to-delivery workflow.
2. Verify the supplier’s actual production capabilities
Ask which stages the supplier performs in-house and which it sources or subcontracts: pattern development, fabric procurement, printing, cutting, stitching, finishing, inspection and packing. A capable partner should explain its workflow and provide product-relevant samples, not just a generic catalogue.
Specialisation matters. Experience producing polyester sublimated teamwear does not automatically establish equivalent competence in high-stretch compression garments or more robust contact-sport apparel. Request a sample demonstrating the construction and decoration method required for your specific product.
3. Assess fabric performance—not just GSM
GSM means grams per square metre: the weight of fabric per unit area. It is useful for comparing materials, but it is not a standalone measure of quality. Fabrics with identical GSM may differ in stretch, breathability, opacity, abrasion resistance and dimensional stability because their yarns, knit structures and finishing processes differ.
For each proposed fabric, ask for its fibre composition, nominal GSM, width, knit construction and intended application. Establish whether wash performance, shrinkage and colourfastness need to be tested against an agreed method. Obtain representative physical samples before approving the production fabric.
Read our sportswear fabric guide covering GSM, composition and durability for more detail.
4. Distinguish the decoration technique from garment construction
Dye sublimation can create detailed multicolour graphics on suitable polyester substrates. Cut-and-sew describes the construction of the garment from fabric panels. These are not mutually exclusive methods: a fully sublimated jersey still needs correctly developed patterns, cutting and stitching. Buyers should compare complete manufacturing workflows, not just printing labels.
Provide vector logos where possible, font information, colour references, print positions and approved size specifications. Clarify how artwork is aligned across seams, how colours will be approved and whether the factory prints fabric before or after panels are cut.
Explore our custom sublimation kit capabilities and the existing sublimation versus cut-and-sew guide.
5. Require sample and technical specification approval
A pre-production sample should demonstrate the agreed fabric, construction, decoration, fit and finishing. Check garment measurements against the approved size chart, examine seams and trim, review print positions and document every correction. For multi-size programmes, confirm the grading methodology and whether additional sizes require review.
Retain a reference sample or signed-off specification. Decide in advance how any unavoidable material, pattern or artwork substitution must be proposed and approved. A photograph alone is rarely an adequate substitute for technical measurements and sample evaluation.
6. Review quality control as a repeatable process
Quality control should span material intake, first-piece approval, in-process checks, decoration, finishing, packing and final inspection. Ask which defects are tracked, how rework is recorded and what information the buyer will receive before shipment.
- What are the measurement tolerances for each garment size?
- Who approves fabric, colour or artwork substitutions?
- How is consistency checked across production batches and repeat orders?
- How are damaged prints, faulty seams or incorrect labels addressed?
- Can the supplier share an inspection summary before dispatch?
Do not assume a certification, laboratory result or ethical-sourcing claim is valid without current supporting documentation tied to the relevant product or facility.
7. Compare quotations on an identical basis
A lower unit price is not necessarily a lower total cost. Check whether each quote includes fabric grade, pattern and sample work, decoration, labels, packaging, inspection, payment requirements and any setup charges. Seek a breakdown of what changes with garment size, print coverage or order volume.
Confirm the agreed Incoterm and named place, such as EXW at the specified factory or FOB at a specified port. International buyers should assess estimated freight, customs duties, taxes and destination handling separately when calculating landed cost.
8. Make the lead time measurable
Ask for a timeline divided into technical development, sampling, approval, raw material procurement, production, quality checks and dispatch. Clarify what event starts the clock—for example, approved artwork, a confirmed specification and receipt of an agreed payment. Establish responsibilities for communicating delays or change requests.
9. Use a consistent supplier scorecard
A simple scorecard keeps the buying decision evidence-led. The following weights are illustrative, not a recognised certification or industry benchmark:
- Technical and product fit — 25%
- Samples and quality evidence — 25%
- Communication and project management — 15%
- Quotation clarity and total cost — 15%
- Production capability and delivery planning — 15%
- Documentation and responsible sourcing — 5%
A high score should never override missing legal documentation, unsafe manufacturing claims or inability to meet mandatory specifications.
10. Send a complete request for quotation (RFQ)
Your first RFQ should state garment type, quantity by size, fibre or fabric requirements, artwork and decoration, labelling, packing, target market, shipment deadline, preferred delivery basis and any compliance or testing requirements. Distinguish non-negotiable requirements from areas where the factory may propose alternatives.
If your design is still developing, say so. It is reasonable to request indicative options first, provided the supplier identifies which elements remain estimates rather than approved production specifications.
Frequently asked questions
Should I choose the cheapest sportswear manufacturer?
Only after comparing equivalent product specifications, sample requirements, quality controls and shipping terms. Defects, inconsistent sizing and delays can outweigh small differences in unit price.
Is sublimation suitable for every type of sportswear?
No. Its suitability depends on fabric composition, design, colour requirements and end use. Alternative printing or branding methods may be more appropriate for some garments.
What must be approved before bulk production?
At minimum, agree the sample and written specification, size breakdown, branding positions, tolerances, inspection approach, pricing, payment terms and delivery conditions.
Discuss your custom apparel project
NineDot Sports works with buyers exploring custom teamwear and performance apparel production. Explore our sportswear manufacturing range and sublimation kits. For an OEM enquiry, prepare your garment specifications, approximate quantities, branding requirements and target market so our team can review your requirements before preparing a quotation.
