INSULATION: 250g HeatLock™ premium hollow-core insulation INSERT: DryHand™ waterproof/breathable SHELL: Ripstop PALM: TechHide FEATURES: Reflective Heat, Amplified. Revolutionary Dual Heating System. Thermal Reflective - up to 20% warmer. Kinetic - Amplifies Temperature 4-5˚. Exclusive Heatwave thermodynamic lining. One-handed wrist & cuff cinch.