Halden Works New Zealand: Odor-Free Yoga Shorts Built on Zinc-Based Deodorant Finish
Halden Works is a New Zealand-based activewear label whose yoga shorts programme sells directly to consumers and through selected retail partners. The team asked us to rebuild the fabric from scratch because a scented finish masked the smell for two washes and then stopped working. The target was a permanent mechanism rather than a fragrance.
Halden Works: odour-control swatch set for the yoga shorts programme
The challenge
The smell built up at the inner thigh and the waistband, 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. A retailer review that questioned the wording of the claim 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 Zinc-Based Deodorant Finish on a polyester/spandex knit base. The mechanism matters: zinc binds the fatty acids in sweat before bacteria can convert them into odour. Keeping the base at brushed jersey with 20% elastane and 225 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/spandex knit fabric
Development and implementation
- Week 1: brief agreed, sweat zone mapped, target set as odour reduction above 80% for ammonia and acetic acid by ISO 17299-2.
- 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 yoga shorts, assessed after eight hours of wear.
- Pre-production: wash durability confirmed at 20 home washes, care wording written as wash at 30-40 degrees and dry away from direct heat.
- Bulk: fixed recipe, consolidated dye lots, ISO 17299-2 repeated on every lot.
Specification delivered
| Parameter | Value |
|---|---|
| Product | Yoga Shorts |
| Base construction | brushed jersey with 20% elastane, 225 GSM |
| Odour-control system | Zinc-Based Deodorant Finish |
| Performance target | odour reduction above 80% for ammonia and acetic acid |
| Test method | ISO 17299-2 |
| Service life | 20 home washes |
| Added cost | USD 0.32 per garment |
| Certification | OEKO-TEX Standard 100, REACH compliant inputs |
Results
The compliance team cleared the fabric for all three sales regions, and one fabric could now serve the whole range instead of three. 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.
“We stopped apologising for smell complaints. The test report answers the question before it is asked.” — Halden Works Product Team
Inline inspection and packing before the yoga shorts shipment
Key takeaway
Care instructions are part of the product. Stating the right wash conditions on the label is what keeps the measured value alive after the garment leaves the store. For Halden Works, that turned a recurring complaint into a feature the brand could sell.
