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Sports Bra OEM: Technical Construction, Support Levels, and Performance Fabrics

Sports bras are the most technically demanding product in the underwear category. They require specialized construction, performance fabrics, and rigorous testing. For OEM buyers entering this segment, here’s your technical guide to sports bra manufacturing.

Support Level Classification

Key Insight: Sports bra manufacturing is the most technically demanding underwear category: low-impact (yoga, walking) requires light compression with removable pads and racerback design, medium-impact (cycling, gym) needs encapsulation with underwire channel reinforcement, and high-impact (running, HIIT) demands full compression with molded cups and wide-band elastic (minimum 3cm). Each support level requires different fabric — nylon/spandex for compression, polyester/spandex for moisture-wicking, cotton/spandex for comfort. Sports bra OEM →

Low Impact: Yoga, walking, lifestyle wear. Light compression, minimal structure. Often pullover style. Medium Impact: Cycling, hiking, dance. Moderate compression, elastic underband, removable cups. High Impact: Running, HIIT, CrossFit. Maximum compression, encapsulation plus compression design, adjustable straps and back closure.

Technical Components

Underband Elastic: 80-85% polyester, 15-20% spandex. 40-50mm width for high impact. Cups: Molded foam (polyurethane or polyester fiberfill), removable padding, or compression-only. Strap Construction: Racerback, cross-back, or adjustable with J-hook conversion.

Performance Fabrics

Nylon-spandex (80/20) for compression. Polyester-spandex for moisture management. Mesh panels for ventilation. Anti-odor treatments using silver ion or zinc technology.

Testing Standards

ASTM D4964 (tension and elongation), AATCC 147 (antimicrobial), AATCC 61 (color fastness). Fit testing on multiple cup sizes is essential. Contact Unitex for sports bra OEM with technical specifications.

Unitex is based in Xiamen, Fujian Province, and develops these programmes with audited partner factories across the Xiamen–Quanzhou–Jinjiang knitwear cluster of south-east China.

· Xiamen Unitex Trade Co., Ltd. — OEM & ODM underwear sourcing partner

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Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.

Sources & references

  1. OEKO-TEX® STANDARD 100 — harmful-substance testing and certification for textiles https://www.oeko-tex.com/en/our-standards/oeko-tex-standard-100
  2. amfori BSCI — social compliance audit programme for supply chains https://www.amfori.org/amfori-bsci
  3. ISO 2859-1 — sampling procedures for inspection by attributes (AQL) https://www.iso.org/standard/2859-1
  4. ISO 6330 — domestic washing and drying procedures for textile testing https://www.iso.org/standard/75934.html
  5. ISO 3758 — textiles: care labelling code using symbols https://www.iso.org/standard/74401.html
  6. Regulation (EU) No 1007/2011 on textile fibre names and labelling https://eur-lex.europa.eu/eli/reg/2011/1007/oj
  7. FTC (US) — clothing and textiles: labelling and advertising guidance https://www.ftc.gov/business-guidance/industry/clothing-and-textiles
  8. CPSIA (US) — consumer product safety improvement act, children's products https://www.cpsc.gov/Regulations-Laws--Standards/Statutes/The-Consumer-Product-Safety-Improvement-Act

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.