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Innovative thermal regulation (Polartec® Alpha®), windproof and water-repellent properties, compressibility – this is the recipe that makes our ksyrium Thermo jkt the perfect spare jacket for autumn and spring. A must-have for various outdoor activities. Main features Polartec® Alpha®: keeps you warm without overheating Polartec® Alpha® is an innovative insulation designed for intense winter activities such as cross-country skiing, ski mountaineering, or trail running. In these activities, athletes often face extreme temperature fluctuations without the option to shed multiple layers. Polartec® Alpha® successfully combines warmth, compressibility, and extreme breathability like no other insulation, making it perfectly suited to the needs of all cyclists when paired with a lightweight windproof fabric. Windproof and water-repellent We have combined Polartec® Alpha® with our best windproof fabric. Extremely lightweight, stretchy, and water-repellent, it was the perfect combination to optimize the performance of our Ksyrium Alpha® jackets and vests. Ultra-versatile, packs into a pocket Versatility is the key design idea of our Ksyrium Alpha® jackets and vests. We aimed to create the perfect insulation jacket, which you could use not only from autumn to spring but also for all outdoor activities: Wear it with a long-sleeve jersey for autumn or spring outings, and pack it into a pocket when temperatures get milder, Use it as an insulation layer during the coldest winter days under a jacket, Take it with you for all your outdoor activities: mountain biking, bike packing, cross-country skiing, ski touring, hiking...
