M: Suitable for palm 8-9cm L: Suitable for palm 9-10cm XL: Suitable for palm 10-11cm Deerskin Suede Leather - Soft and Durable Machine Wash HEATLOK THERMAL LAYER FOR EXTREME COLD WEATHER - Heatlok is a high-tech patented system of hollow fibers and microfiber that provides warmth without excess bulk or loss of dexterity.The Heatlok system "traps" air creating a thermal barrier keeping the warmth in the winter gloves.These unique layer combines with the polar fleece lining to keep your hands in these thermal gloves warm even when temperatures plummet in the range of - 20F to 0F. PERFECT COMBINATION OF SOFTNESS AND COMFORT - Our Fleece Winter Sports and Genuine Deerskin Leather Gloves for Men and Women are made of a Deer Suede Leather palm for superior grip and protection , warmth, and comfort. ELASTIC WRIST CUFF - The shirred elastic wrists of these cold weather gloves allow you to keep the cuff closed around your skin, keeping the cold wind out.