The Assos Winter Long Sleeve Skin Layer is a prime method of core temperature regulation through winter rides. This version is specifically engineered to fit a womans body. As the lowest layer in your winter hear setup, this garment lays comfortably against the skin and provides outstanding insulation despite a lightweight build. It is 13 percent lighter than the previous version without losing any warmth. A circular seamless construction makes it the most comfortable way to stay warm. It has a combination of polypropylene and carbon fiber yarns mixed with elastane which keep moisture away from the body while keeping it warm. The Winter Skin Layer is made with a taller collar to keep your neck warm and protect as much of your body from the wind as possible. This garment is a must have for staying warm and comfortable on winter rides.