Direct answer
Specify the liner as its own fabric: composition, recovery, seam type and rise. Pair it with the shell on a washed garment sample. Compression liners need recovery checks; mesh briefs need chafe and coverage checks before you open colour MOQ.
| Liner type | Best for | Approve |
|---|---|---|
| Compression knit | Gym support, 2-in-1 training | Recovery after wash + squat |
| Mesh brief | Run / hot climate ventilation | Chafe at inner thigh |
| Flatseam / bonded | High-mileage athletes | Seam abrasion and adhesive wash |
| No liner | Linerless silhouettes | Pocket bag and swing only |
Liner is a product, not a free add-on
The liner sets support, chafe risk and wash life. Treat it as its own fabric platform with recovery and seam rules.
Common options
Power-knit compression liners for support; lighter mesh briefs for ventilation; bonded or flatseam builds when chafe is the primary complaint from athletes.
Shell + liner pairing
A soft shell with an aggressive liner can feel excellent in the gym and fail after wash if recovery is weak. Approve the pair together.
Sampling gate
Squat, stride and seated tests after wash. Check elastic height, crotch seam and hem grip before PPS.
Common mistakes
- Copying a competitor liner without a mill sheet
- Approving shell first and liner last
- Skipping wash recovery on compression liners
Buyer advice
- Put liner GSM and recovery on the quote line
- Test chafe with the athlete’s sock and shoe setup when possible
- Lock elastic and rise before branding placement
Buyer FAQ
Questions procurement usually asks next
Do all training shorts need a liner?
No. Linerless programmes are common. Choose based on brand positioning and athlete feedback — not habit.
Can I change liner later in bulk?
Possible but expensive. Treat liner changes as a new sample path, not a mid-bulk tweak.
What fails most often?
Bagging after wash, elastic roll, and crotch seam abrasion on high-mileage athletes.
Evaluate styles
From this insight → library products
Open a sample path on a live block — then confirm fabric platform and MOQ on the RFQ.
Downloadable library summary: Lookbook PDF. Legal entity: Guangzhou Elevia Apparel Technology Co., Ltd.