Cobalt Ridge Denmark: Odor-Free Tennis Dresses Built on Silver Ion Antibacterial Finish

Cobalt Ridge is a Denmark-based activewear label whose tennis dresses programme sells directly to consumers and through selected retail partners. The team asked us to rebuild the fabric from scratch because the range was moving into hotter markets where the same styles smelled far worse. The target was odour control that held up in high-humidity conditions.

Cobalt Ridge: odour-control swatch set for the tennis dresses programme

The challenge

The smell built up at the built-in short and the chest band, 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 seasonal launch into a new climate 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 bonded knit with inner shorts and 210 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 tennis dresses, 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

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.

“The wear trial convinced our buying team faster than any certificate could have.” — Cobalt Ridge Product Team

Inline inspection and packing before the tennis dresses shipment

Key takeaway

Sweat is almost odourless; bacteria create the smell. Treating the bacteria and moving the moisture at the same time solved a problem that neither approach had solved alone. For Cobalt Ridge, that turned a recurring complaint into a feature the brand could sell.