A $7 Decathlon tee and a $55 big-brand shirt might have come off the exact same loom.

1. CNY 49 vs. CNY 399: how much is in the cloth?

A $7 (CNY 49) quick-dry tee from Decathlon versus a $55 (CNY 399) equivalent from a big sports brand: the gap catches the eye. A Nike Dri-FIT product page, for example, lists 100% polyester as its fiber composition. ^[3] Flip two care labels over and they may both say the same thing. Does that make the expensive shirt's fabric ten times better? Not necessarily. The two fabrics could even pass through similar knitting and dyeing capacity, although we have no evidence that these particular shirts came from the same loom or dye vat.

A conventional short-sleeve quick-dry shirt may use around 1–1.5 meters of fabric, depending on the size, pattern and usable width. The contributor's comparison uses 1.3 meters at a nominal 150 cm width and roughly 140–160 GSM. The translated table below shows the cost ranges supplied for the two price tiers. Its finished-fabric row suggests a difference of around CNY 2–3 per meter, or approximately CNY 3–5 for 1.3 meters. That is a much smaller number than the CNY 350 retail gap.

The table's POY raw-material row needs one unit check before it can be used as a purchase-order calculation. The accompanying source quotes POY by the ton, while the table labels CNY 8–9 per meter. Without the actual yarn mass per meter and process loss, those are not the same unit. Treat the final fabric-price ranges as the contributor's market comparison, then request a dated, like-for-like mill quotation for a decision.

2. Why “the same loom” is a real possibility

The submitted research cites an August 2026 polyester POY quotation of CNY 8,950 per ton, polyester chips at CNY 7,350 per ton, online greige listings from CNY 1.42 to CNY 5.51 per meter, and 1–1.5 meters of fabric per shirt. These figures describe different stages and product specifications, so they cannot simply be added together. Their practical use is to show why a buyer must state the unit, width, weight and processing stage beside every quote.

China's quick-dry fabric production is distributed across large textile clusters. A knitting or garment factory can serve several brands, and identical broad composition labels can conceal different yarn deniers, knit densities, dye recipes and inspection rules. Taimushi's published IPO prospectus provides a concrete example of multi-brand apparel manufacturing. It reports sales to Decathlon of CNY 423.00 million in 2018, CNY 466.12 million in 2019 and CNY 373.39 million in 2020—56.05%, 58.90% and 53.84% of its revenue respectively. It also names other apparel customers, including Semir and Quiksilver. ^[2] That establishes a shared supplier, not that a Nike and a Decathlon T-shirt shared one roll of fabric.

The same production equipment can run different brands' orders on different days. It might use the same greige construction for several clients, or it might not. A brand can specify a fabric, accept a supplier-catalog construction, require a different finish, or impose a stricter bulk tolerance. The consumer sees a logo and a fiber label; the production team sees a specification, process route and test file. That is the useful point behind the headline.

The supplied draft also cites Longxing Tianxia's margins and customer concentration. Longxing is a sports-footwear manufacturer. Its disclosures may illustrate how an OEM serves multiple brands, but a shoe maker's gross margin or profit per pair cannot establish the processing margin on a T-shirt. For this shirt comparison, the directly relevant evidence is the apparel supplier's prospectus and the fabric specification itself.

3. Where might a CNY 399 price tag go?

The retail price of a shirt is not the fabric invoice multiplied by a fixed factor. Pattern development, sampling, cutting, sewing, trims, packaging, freight, inventory risk, stores, online acquisition, returns, tax and company overhead all sit between the fabric mill and the consumer. The second translated table puts numbers beside some of those layers. It is a costing framework from the submitted article, not a Nike or other brand's published shirt-level income statement.

The table starts with fabric at CNY 18–23, garment making at CNY 5–8 and trims at CNY 1–2. It then gives a combined factory price of CNY 25–33. The later rows assign CNY 80–120 to brand operations and marketing, CNY 100–150 to channel distribution, and CNY 60–80 to brand profit. These ranges are not necessarily additive at their endpoints and do not account for every tax, discount or return. They do show the scale of spending that can sit beyond the physical garment.

A higher price can buy a better pattern, a more consistent batch, stronger after-sales service and a more convenient retail experience. It can also reflect advertising and brand positioning. A shopper cannot establish the proportions from the hangtag alone; the table is a way to ask what a brand must fund after leaving the factory.

4. Same composition, different product decisions

Decathlon's own 2025 report gives the scale of its integrated model: CNY prices aside, the group reported €20.7 billion in GMV, €16.8 billion in net sales, €910 million in net income, €1.8 billion in EBITDA and 1,902 stores. ^[1] Dividing net income by net sales gives about 5.4%. That is a company-wide result, not the profit margin on a CNY 49 T-shirt.

The submitted shirt-level sketch allocates about CNY 18 to fabric, CNY 5 to cutting and sewing, and CNY 1 to trims, for an approximate CNY 24 factory cost. At a CNY 49 selling price, the remaining CNY 25 must cover distribution, staff, rent, taxes, losses, returns and profit. An integrated retailer can avoid one independent wholesale layer, but these costs do not disappear. It is not possible to infer a precise sub-CNY 5 profit per shirt from group accounts.

So where might two 100% polyester shirts really differ? The third translated table points to yarn fineness, fabric weight, finishing recipe, colorfastness control, stitching and pattern. A 50D yarn is finer than 75D by denier definition, though yarn count alone cannot prove a softer finished cloth. Similarly, a finishing recipe may change moisture behavior, but a universal 5%–10% performance gap is not established without the same test on the two actual shirts.

The comparison below gives buyers a checklist for inspection. It is not a lab report on specific Decathlon and big-brand SKUs. The useful question is not whether both labels say polyester; it is whether the finished shirt meets the hand, fit and performance that its buyer values.

The real fabric gap—and the limits of a logo

A change in yarn fineness, such as 75D to 50D, can increase material cost. The supplied calculation puts that gap at CNY 1–2 per meter and finishing differences at a smaller share. The actual change depends on filament count, yarn quality, knit density, order size and the approved finish. A denier number by itself is not a complete quotation.

The article's CNY 350 price-premium shorthand assigns roughly CNY 50 to material and construction, CNY 100 to pattern and quality work, and CNY 200 to brand equity. It communicates the central point clearly: much of a retail premium can lie outside raw fabric. It cannot be treated as an audited ledger for Nike or a particular CNY 399 product. Celebrity campaigns, store fit-outs and marketing narratives can be costly, but so can product development, distribution, inventory and returns.

You are paying for more than cloth. Whether that additional value matters is a choice for the wearer. Someone who values fit, a specific cut, customer service or a brand may reasonably spend more. Someone who only needs a reliable running tee may prefer the lower-priced option. The common polyester label settles neither decision.

5. How sourcing managers and consumers should choose

For a fabric sourcing manager, start with a comparable construction rather than a brand hangtag. The submitted market range for a 145 GSM, 75D polyester knit with moisture-management finishing is CNY 12–16 per meter at ex-factory level. Ask for the finished width and weight, yarn specification, knitting structure, dye route, finish, test results, quantity per color and price validity date. A quotation for greige is not a quotation for dyed and finished fabric. Keep the physical approved sample beside the written specification.

The three practical controls are yarn fineness, finished GSM and finishing process—but add stretch, dimensional stability, colorfastness and moisture testing where the product needs them. Do not assume all fabrics with those same three labels are interchangeable. If two shirts truly use identical bulk fabric, other garment-level costs can still differ. If the fabric is not identical, ask which measurable property the premium buys.

For a consumer, a CNY 49 Decathlon quick-dry tee may be entirely adequate for routine running or gym sessions. A CNY 399 shirt may offer a cut, feel or details that justify the price for a particular wearer. Neither a brand logo nor the phrase “100% polyester” proves the moisture result. China's current GB/T 21655.1-2023 standard covers an evaluation method for moisture absorption and quick drying; look for the specific test and result attached to the product claim, rather than assuming that merely printing a standard number on a label proves every performance promise. ^[4]

Knowing how the supply chain works will not eliminate a poor purchase. It does make the next question sharper: what, specifically, does the extra CNY 350 buy on these two actual shirts?