All Kostüme product development starts with a hunt for the perfect fabric. Once we’ve find it, it becomes the benchmark for finding something even better. You could call it something of an obsession.

For our signature warmer range, we use a mid-weight GRS-certified recycled fabric with a luxurious brushed microfibre inner that feels super-soft on the skin. 

Although warm enough to deal with the worst that shoulder season has to offer, it also has the breathability needed to comfortably deal with temperatures up to 12ºC, reducing the need to adjust your layering as the conditions change.

Modest amounts of two-way stretch also allows for some lateral expansion to accommodate larger arms, but without stretching and deforming when pulled repeatedly on and off. 

All Kostüme product development starts with finding the perfect fabric. And then, once we’ve found it, we use it as a benchmark to look for something even better.

For our signature warmer range, we use a mid-weight GRS-certified recycled fabric with a luxurious brushed microfibre inner that feels super-soft on the skin. 

It also has the breathability needed to comfortably deal with temperatures up to 12ºC, reducing the need to adjust your layering as the conditions change.

Modest amounts of two-way stretch also allows for some lateral expansion to accommodate more muscular arms, but without deforming too much when pulled on and off. 

Despite our ‘less is more’ ethos, we know from experience the limitations of a one-piece tubular warmer, so we’ve developed an ergonomic pre-shaped four-panel construction, complete with low-profile flatlock seams. Designed to mimic the natural position of the arms when cycling, this also means a slightly longer length at the outer wrist edge, and less fabric in the elbow crease to minimise bunching. TLDR?: Supremely comfy. No chafing. 

In a final nod to comfort, we’ve specified an extra-wide gripper panel using offcuts of the amazing recycled fabric from our bib short, meaning less waste, less unsightly bulk under your jersey sleeves and a smoother transition between fabric and skin. And to eliminate the ancient guessing game of 'which arm is which’ you’ll find the answers printed on reflective tabs sewn discreetly into each forearm seam.

Our arm warmers are available in six (count them) different lengths, meaning whatever your build there should be an option to suit.