Stormy Kromer Men's Tough Mittens 100% Wool Deerskin - This is a rare material to use, but it's thick and rich and durable, and the palms of these mittens use real deerskin. Wool-Nylon Blend - To ensure that your hands stay warm, the outers of these mittens are constructed out of a blend of wool and nylon. Sherpa Lining - You would be hard-pressed to find a material for insulation and a lining that's more warm and comfortable than sherpa. Weather-Proof - These mittens were designed to hold up to some of the toughest winters in the north, including snow, rain and other elements. Function - These are mittens that are able to operate like gloves when it comes to the mobility and use of your fingers and hands.