Pulse Meridian Sweden: Odor-Free Warm-Up Hoodies Built on Bamboo Charcoal Filament Yarn
Pulse Meridian is a Sweden-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 existing fabric passed every laboratory test yet still failed in wear trials. The target was a solution validated by wear panels rather than by a certificate alone.
Pulse Meridian: 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. A negative review thread on the brand's own product page 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 Bamboo Charcoal Filament Yarn on a polyester filament knit base. The mechanism matters: the porous carbon structure adsorbs odour molecules instead of masking them. 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 polyester filament knit fabric
Development and implementation
- Week 1: brief agreed, sweat zone mapped, target set as bacterial reduction above 95% with odour adsorption above 75% 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 gym hoodies, assessed after eight hours of wear.
- Pre-production: wash durability confirmed at permanent inside the fibre, care wording written as standard laundering, nothing is applied to the surface.
- Bulk: fixed recipe, consolidated dye lots, JIS L 1902 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 | Bamboo Charcoal Filament Yarn |
| Performance target | bacterial reduction above 95% with odour adsorption above 75% |
| Test method | JIS L 1902 |
| Service life | permanent inside the fibre |
| Added cost | a 10% yarn premium |
| Certification | OEKO-TEX Standard 100, REACH compliant inputs |
Results
Smell-related returns fell by 71% inside one season, and the style moved onto a fixed repeat recipe with test reports issued per lot. 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.” — Pulse Meridian Product Team
Inline inspection and packing before the gym hoodies shipment
Key takeaway
The brand's real problem was a claim it could not support. Once testing was tied to a named standard and repeated per lot, the same fabric could be defended to retailers and to customers. For Pulse Meridian, that turned a recurring complaint into a feature the brand could sell.
