Knit cuff, leather palm, and a waterproof, breathable membrane It's a simple concept. Stay warm, stay dry, and ride longer. The Burton Treeline Leather Mittens have you covered with waterproof, insulated warmth and the time-tested durability of leather. Features: Durable leather palms have natural-flexing feel for fiddling with zips and buckles. Breathable ThermacoreECO insulation cranks up the heat without adding bulk or restricting mobility and contains 95% recycled materials. A DRYRIDE membrane provides waterproof, breathable weather protection. By purchasing this product, you are supporting Leather Working Group certified tanneries who prioritize responsible production that supports environmental sustainability.