Heatwave technology the Heatwave kinetic heat return system amplifies your body heat and reflects it back to you in dual stages, keeping waves of heat in. "Look for the Silver lining" 1. Kinetic energy converts emitted energy into increased heat amplifying the temperature inside the glove by 4-5 degree 2. The reflective layer radiates heat back for 20% more warmth Shell: 95% Polyester/5% Spandex; Palm: 55% Polyamide/45% Polyurethane; Lining & Insulation: 100% Polyester Drawstring closure Hand Wash WAVES OF HEAT - Kinetic heat return system amplifies your body heat 4-5 degrees, and reflects it back to you for 20% more warmth WATERPROOF, BREATHABLE INSULATION - Fully lined with 250g Heatlock Insulation with a Waterproof, Breathable Dryhand insert that provides warmth without excess bulk or loss of dexterity DURABLE, COMFORTABLE - The Softshell Outer Shell and Amara Palm ensures a comfortable, sure grip and will keep your hands warm and dry in wet and windy conditions​​