Fit & Design: Comfortable interior built around Primaloft(R) and HeatLock(TM) insulation encased in a durable Stretch Twill shell GORE-TEX(R) insert helps keep you dry Heatwave(TM) dual heating system lining reflects and amplifies your body's heat Thermal Reflective stage - up to 20% warmer Kinetic stage - amplifies temperature 4-5deg Additional Details: Recommended for: on-mountain use and extended periods in the cold