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Seamless Activewear Manufacturer

Yesseam is a seamless activewear manufacturer in Xiamen, China, with fully in-house circular seamless knitting. We produce seamless leggings, sports bras, sets and bralettes for global activewear brands — as private label or full OEM/ODM, with the tested, certified quality and consistency of a real, vertically integrated factory you can audit.

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Seamless knitting, fully in-house

Most "seamless" suppliers outsource the actual knitting. We don't. Yesseam runs circular seamless machines under our own roof, alongside cut & sew, dye-sublimation and finishing — a level of vertical integration that gives us control over fit, fabric hand-feel and lead time. That's why we describe ourselves as a vertically integrated seamless activewear factory in Xiamen, China: not a trading company, but a real seamless specialist.

Seamless construction knits the garment as a single tube with minimal stitching. The result is a genuine second-skin fit, fewer chafe points, better stretch recovery and a smoother look under clothing — the qualities premium yoga and training brands are built on.

Macro of matte seamless knit fabric showing the loop structure and a rib zone transition
Seamless knit structure with a knitted-in transition from flat knit into a denser rib zone — shaping done by stitch, not by seam.

What we make in seamless

Seamless leggings

Seamless sports bras & bralettes

Seamless sets

Fabrics & specs

Our seamless yarns run 75–80% nylon / 20–25% spandex at 230–280 GSM with 4-way stretch, plus GRS-certified recycled options. The facility is BSCI audited and works with GRS and OEKO-TEX Standard 100 certified materials, under ISO 9001 quality management.

Fine nylon yarn and a folded panel of matte seamless knit fabric
Yarn specification is where a fabric spec really begins — denier and filament count decide the hand long before the garment exists.

Quality, samples & lead time

Private label & OEM/ODM

Apply your brand to proven seamless styles (private label), manufacture to your tech packs (OEM), or co-develop from our seamless library (ODM). See private label & OEM and our yoga apparel capabilities, or read the FAQ.

FAQ

What is a seamless activewear manufacturer?

A seamless activewear manufacturer knits garments on circular seamless machines as a single tube with minimal stitching, producing leggings, sports bras and sets with a second-skin fit, fewer chafe points and better stretch recovery. Yesseam knits seamless fully in-house in Xiamen, China.

Is Yesseam a real seamless factory or a trading company?

Yesseam is a real, vertically integrated seamless factory in Xiamen, China. We run our own circular seamless knitting, cut & sew, dye-sublimation and finishing in-house, and we welcome factory audits — so you work directly with the people who make your garments, not a middleman.

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