Leg warmers are an essential layering piece, and the Thermal Knee Warmers are no exception. Throw 'em in your pocket for a post-work spin, or start with them on for a ride with inclement weather‚these warmers are warmer than our Seamless Warmers, ensuring you have plenty of insulation from Old Man Winter's sting. - Light-tack grippers keep the warmers in place. - Bottom hem zippers make for easy and simple entry and exit of the warmers. - Fabric Content: 84% Polyamide, 16% Elastane.