A sports bra is the hardest piece in any activewear range to get right: it has to balance support, comfort and clean skin-contact construction at a price your buyers will pay. Linked Sourcing develops full custom sports bras from 200 pcs per color and style, while standard ready styles are supplied privately through our Excel catalogue from 50 pcs per style. We produce low-, medium- and high-impact bras for gymwear and fitness brands shipping into Europe, North America, Australia and Japan — using the same seamless and four-needle six-thread lines that run our active and yoga and seamless programs.
Support levels: low, medium and high impact
Support level is the first decision because it drives almost every construction choice downstream. These are product-development categories, not universal laboratory ratings. Define the intended activity, size/body matrix and support protocol before briefing fabric or cups.
| Support level | Best for | Typical construction |
|---|---|---|
| Low impact | Yoga, pilates, lounge, light studio | Single-layer knit, pull-on, light or no padding, soft elastic |
| Medium impact | Gym training, cycling, general fitness | Compression knit, removable pads, wider band, racerback |
| High impact | Running, HIIT, court sports | Encapsulation + compression, molded cups, structured band, adjustable straps |
Low-impact bras may use lighter structures and a clean bonded band. Medium-impact concepts often add a defined underband and racerback; high-impact concepts may combine encapsulation with overall compression, molded cups, a structured underband and adjustable or convertible straps. Construction labels do not prove an impact-support level by themselves: approve the finished bra on the intended body and activity matrix.
Construction: cups, pads, seams and backs
Molded cups vs. pad pockets. Molded foam cups can create a pre-shaped front and controlled coverage. Removable pads in an internal pocket create a different care, placement and SKU decision. We can develop either route where pattern, tooling, component and MOQ feasibility allow it; neither option proves a support class until the finished bra passes the buyer’s protocol.
Bonded vs. stitched. Bonded construction can create a flatter, lower-profile edge; stitched construction using four-needle six-thread or flatlock provides a different joining and repair path. We use both, and can combine bonded edges with stitched structural seams. Bond integrity, seam performance, skin contact, grading and wash durability must be approved on the exact materials and construction—“bonded” does not prove chafe-free, and “stitched” does not automatically prove greater durability.
Backs and straps. Racerback, U-back, cross-back, clasp-back and convertible systems distribute load and allow movement differently. We can develop bonded, encased or knitted-in band/strap structures where feasible, but placement, adjustment range, pressure, slippage and recovery after care must be checked across the intended size/body matrix.
The fabrics we actually run
Sports bra hand-feel and support come straight from the knit. These are real blends running on our seamless and active lines, not generic jersey:
- Buttery nylon–spandex (78% Nylon / 22% Spandex, up to 67/33) — a smooth, close-to-skin handle; fiber percentages alone do not prove compression or support.
- Polyamide–elastane and polyamide–polypropylene seamless blends (92% Polyamide / 8% Elastane; 89% Polyamide / 8% Polypropylene / 3% Elastane) — knitted-to-shape on Santoni and Shima Seiki machines for zonal structures and fewer side seams; support still needs finished-product evidence.
- Silver-fiber constructions (72% Polyamide / 15% Silver Fiber) are available for selected high-sweat concepts; any odor-control, antibacterial, thermal or wearer claim needs exact material identity, applicable testing and destination-market review.
- Swim-grade nylon–spandex (86% Nylon / 14% Spandex) when a bra crosses into swimwear or chlorine-resistant resort ranges.
Over 60% of our active fabrics are recycled or eco, and all are PFAS-free — increasingly a buying requirement in the EU.
Use the compression activewear testing guide to distinguish underband or fabric power, finished-garment pressure and a wearer-support claim. A textile force result alone does not prove low-, medium- or high-impact sports-bra support.
Use the sports bra support testing guide to build separate approval gates for static fit, breast motion, strap/underband pressure, wearer perception and support after care. Brand support labels are not universal laboratory classes.
If the concept extends into a cami or tank, use the built-in-bra tank manufacturing guide to measure the outer shell and internal shelf/frame separately, define pad pockets and openings, and grade the neckline, armholes, straps, underbust band and cup/body coverage together. A longer outer body can hide shelf migration; it does not remove the fit or support decision.
MOQ, sampling and lead times
Choose the numeric MOQ route that matches how much of the sports bra you need to change:
- MOQ: full custom from 200 pcs per color and style; private ready styles from 50 pcs per style.
- Sampling: 7–10 working days for a fit/proto sample.
- Bulk production: 30–45 days after sample and PO confirmation.
- Trade terms: FOB, CIF or DDP; payment by T/T, L/C or open account.
You can run a tight first drop, validate fit and support on real bodies, then scale the winners. See our OEM vs ODM activewear guide to decide whether you send a tech pack (OEM) or co-develop the bra from concept with our in-house design team and fabric library (ODM).
Quality and certifications
Because a sports bra is worn directly against the skin during heavy sweating, material safety and documented product requirements matter. Relevant material, social and chain-of-custody documents can include OEKO-TEX STANDARD 100, BSCI, Sedex, bluesign and GRS, depending on the facility, material and claim; third-party SGS, BV or Intertek inspection/testing is available on request. Quality uses IQC, IPQC and FQC controls. A buyer-agreed final acceptance plan can use AQL 2.5 where specified, but support, fit, chemical and durability requirements need their own evidence. See the AQL 2.5 activewear inspection guide.
As a factory-direct group of six owned, vertically integrated factories (~515,000 pcs/month) with ~1,200 in-house workers, Linked Sourcing directly coordinates knitting, cutting, bonding, sewing and inspection rather than presenting itself as a trading-company broker. The approved pattern, BOM, sample, reports and PO still need traceable controls from development through bulk.
Start your sports bra program
Whether the brief uses low-, medium- or high-support positioning, define the intended activity and evidence before freezing construction. Sampling is normally 7–10 working days after the requirements and feasible materials/components are confirmed. Send your sports bra tech pack or reference sample through the Full Custom inquiry for an order-specific development review.
