Warm enough to wear alone and thin enough to layer, the Heatwave Heat Pocket glove liner provides a base layer that drastically changes how you feel in the cold with a combination of the Seirus exclusive Heatwave lining and an included heat pack pocket. The revolutionary dual heating system found in the Heatwave lining reflects and amplifies your bodys heat to produce that warm cozy feeling we all look for in a glove. Reflective Heat, Amplified. Thermal Reflective stage - up to 20% warmer. Kinetic stage - Amplifies Temperature 4-5. Recommended for: wearing alone on cold days or layering for extreme warmth. REVIEWS Q&A