Seirus Innovation Heatwave Accel Mitt Shell: 100% Nylon; Palm: 60% Polyurethane, 40% Polyester; Lining and Insulation: 100% Polyester Imported 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 300g Heatlock Insulation with a Waterproof, Breathable Dryhand insert that provides maximum comfort and warmth DURABLE, COMFORTABLE - TheRipStop Outer Shell and LeatherTex Palm ensures a sure grip and will keep your hands warm and dry in wet and windy conditions KEEP THE COLD OUT - One-handed wrist and cuff cinch ensures a snug fit. The drawstring cord keeps the cold out MORE WARMTH - Mittens provide extra warmth because your fingers share one compartment and generate more heat. TOP SELLER!