Layer up for the cold with the Assos LS.skinFoil_winterPlus, a versatile, super-soft innovative polypropylene fiber blended base layer, engineered to keep your body temperature warm and stable throughout a wide temperature range. The high-loft inner surface insulates your body, drawing moisture to the fabric's outer surface for quick evaporation. Natural, anti-microbial silver fibers are knit into the fabric to neutralize odor-causing bacteria. You can try a heavier or lighter skinFoil under your chosen Assos jersey or jacket, allowing you to perfectly calibrate your outfit to your personal needs and preferences. Stretchy arm inserts promote a comfortable, non-restrictive fit. Ideal for 0 to 32 degrees Fahrenheit.