Northlane Active New Zealand: Odor-Free Warm-Up Hoodies Built on Silver Ion Antibacterial Finish
Northlane Active is a New Zealand-based activewear label whose gym hoodies 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 gym hoodies programme
The challenge
The smell built up at the back panel and the cuffs, 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 Silver Ion Antibacterial Finish on a nylon/spandex knit base. The mechanism matters: silver disrupts bacterial metabolism so the bacteria that create body odour cannot multiply. Keeping the base at brushed back fleece with 5% elastane and 300 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 nylon/spandex knit fabric
Development and implementation
- Week 1: brief agreed, sweat zone mapped, target set as bacterial reduction above 99% after 10 washes by ISO 20743.
- 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 gym hoodies, assessed after eight hours of wear.
- Pre-production: wash durability confirmed at 30 home washes, care wording written as wash at 30 degrees without fabric softener.
- Bulk: fixed recipe, consolidated dye lots, ISO 20743 repeated on every lot.
Specification delivered
| Parameter | Value |
|---|---|
| Product | Warm-Up Hoodies |
| Base construction | brushed back fleece with 5% elastane, 300 GSM |
| Odour-control system | Silver Ion Antibacterial Finish |
| Performance target | bacterial reduction above 99% after 10 washes |
| Test method | ISO 20743 |
| Service life | 30 home washes |
| Added cost | USD 0.40 per garment |
| Certification | OEKO-TEX Standard 100, REACH compliant inputs |
Results
The wear panel scored the new fabric two points cleaner on a five-point scale, and the brand rewrote its product page claim to match the test method. 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.
“Their team explained the mechanism in one sentence, and the bulk fabric behaved like the sample.” — Northlane Active Product Team
Inline inspection and packing before the gym hoodies shipment
Key takeaway
Sustainability and performance were not in conflict here. Choosing the right mechanism satisfied the compliance team without asking the customer to accept less protection. For Northlane Active, that turned a recurring complaint into a feature the brand could sell.
