These expedition-grade, altitude-oriented mitts are super warm and super durable, without being bulky or heavy. The waterproof shells come complete with thick fleece lining the palms and synthetic insulation on the back of the hand, and the removable liners have the same fleece and loft combination. The fleece provides you with crush-resistant warmth and a secure grip, while the synthetic insulation offers compressible warmth. With leather palms so you can grip your gear, our Goretex waterproof mittens make all of your outdoor goals achievable. The gloves are rated for some of the world's highest peaks, Arctic expeditions, and seriously cold endeavors.