The Seirus EVO ST Heatwave™ Glove Liners are the perfect fit to keep your hands warm everywhere. Engineered with EVO Heatwave™ technology to provide excellent protection for your hands during cold days. It features the revolutionary dual heating system found in the Heatwave™, which reflects and amplifies your body's heat to produce that warm cozy feeling. The EVO ST Heatwave™ amplify the temperature of your hands around 4 to 5°. Designed with hypoallergenic materials to provide odor-free no matter how active is your day. The EVO ST Heatwave™ Glove Liners are a great choice if you want unlimited softness and protection.