The Mavic Ksyrium Thermo vest is a versatile piece for autumn and spring thanks to its innovative thermoregulation (Polartec Alpha), windproof and water-repellent properties, and compressibility. A must-have for many other outdoor activities. 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 tend to face extreme temperature variations without the possibility of shedding layers. Polartec Alpha manages to combine warmth, packability, and extreme breathability like no other insulation, making it perfectly suited to the needs of all cyclists when paired with a lightweight windproof fabric. Mavic has combined Polartec Alpha insulation with the best internal windproof fabric. Extremely lightweight, stretchy, and water-repellent, it was the perfect combination to enhance the performance of Ksyrium Alpha jackets and vests. Versatility was the key idea in the design of the Ksyrium Alpha jacket and vest. We wanted to create the perfect insulating jacket to be used not only from autumn to spring but also for all outdoor activities. Use it with a long-sleeve shirt for autumn or spring outings, and pack it into a pocket when temperatures become milder. Use it as an insulating layer on the coldest winter days under a winter jacket, and take it with you for all outdoor activities: mountain biking, cross-country skiing, ski mountaineering, hiking.

• Polartec Alpha: warm without overheating.
  
• Windproof and water-repellent.
  
• Versatile, can be folded into a pocket.
  
• 2 zippered back pockets.
  
• Reflective light points.
  
• DWR treatment (PFC-free).
  
• Color: Green (Xmas green).