Northlane Active Switzerland: Odor-Free Compression Base Layers Built on Built-In Antibacterial Masterbatch Yarn
Northlane Active is a Switzerland-based activewear label whose base layers programme sells directly to consumers and through selected retail partners. The team asked us to rebuild the fabric from scratch because the sustainability team rejected a biocidal finish that was on the first sample. The target was odour control that complied with the brand's restricted substance list.
Northlane Active: odour-control swatch set for the base layers programme
The challenge
The smell built up at the back and the underarm, where sweat sits longest during a session. The previous fabric was a standard synthetic knit with no odour strategy, so bacteria broke the sweat down on the fabric and the smell became permanent after a few weeks. An internal compliance review before bulk booking made the problem urgent: the brand needed a fix before the next bulk booking, not a new supplier search.
The fabric solution
We built the programme around Built-In Antibacterial Masterbatch Yarn on a polyester filament knit base. The mechanism matters: the active agent is locked inside the fibre so it cannot be washed off the surface. Keeping the base at plated knit with 12% elastane and 190 GSM meant the hand, the stretch and the cover stayed exactly where the design team wanted them, because odour control changed the chemistry and the construction rather than the silhouette.
Wear trial and fit approval of the polyester filament knit fabric
Development and implementation
- Week 1: brief agreed, sweat zone mapped, target set as above 99% bacterial reduction retained after 50 washes by JIS L 1902.
- Week 2–3: laboratory knits produced and tested; add-on level adjusted until the target was met with margin.
- Week 4–5: wear trial on finished base layers, assessed after eight hours of wear.
- Pre-production: wash durability confirmed at 50 washes or more, care wording written as standard laundering with no special requirement.
- Bulk: fixed recipe, consolidated dye lots, JIS L 1902 repeated on every lot.
Specification delivered
| Parameter | Value |
|---|---|
| Product | Compression Base Layers |
| Base construction | plated knit with 12% elastane, 190 GSM |
| Odour-control system | Built-In Antibacterial Masterbatch Yarn |
| Performance target | above 99% bacterial reduction retained after 50 washes |
| Test method | JIS L 1902 |
| Service life | 50 washes or more |
| Added cost | an 8% yarn premium |
| Certification | OEKO-TEX Standard 100, REACH compliant inputs |
Results
The fabric held its odour value through 30 home washes with no measurable drop, and care wording was updated on the hangtag to protect the value. The odour value was re-measured on bulk fabric rather than on the approval sample, so the result reflects what customers actually received. The programme is now on its third repeat with the same recipe.
“The wear trial convinced our buying team faster than any certificate could have.” — Northlane Active Product Team
Inline inspection and packing before the base layers shipment
Key takeaway
A wear trial cost two weeks and prevented a bulk mistake. Laboratory numbers predict performance, but only wearers find the complaints that reach customer service. For Northlane Active, that turned a recurring complaint into a feature the brand could sell.
