Polartec® Alpha® is an innovative insulation designed to perform in intense winter activities such as cross-country skiing, ski mountaineering or trail running. In these activities, athletes tends to face extreme temperature variations without much opportunity to shed layers.
Polartec® Alpha® successfully combines warmth, packability and extreme breathability like no other insultation, making it perfectly suited to needs of all cyclists when paired with a light windbreaker fabric.

We combined Polartec® Alpha® insulation with our best inhouse windproof fabric.
Extremely lightweight, stretch and water-repelent, it was the perfect match to enhance the performance of our Ksyrium Alpha® Jackets and vests.

Versatility was the key idea when designing our Ksyrium Alpha® jacket and gilet. We set out to make the perfect insulation jacket you could not only use for cycling from autumn to spring, but you would also use for all outdoor activities.
Use it with a long-sleeved jersey for autumn or spring rides, and stow it into a pocket when temperatures gets milder. Use it as an insulating layer in coldest winter days under a winter jacket. Take it with you on any outdoor activities : mountain biking, cross country skiing, ski touring, hiking...