Waterproof full grain leather or suede upper. Fleece thermo insulation lining for added warmth. 200g Merrell M Select WARM™ lightweight, low-bulk, synthetic insulation. M Select DRY seals out water and lets moisture escape so you stay dry when you’re on the move. Molded nylon arch shank. Merrell ActiveHeat™ insole with silver reflective film for added warmth. Merrell air cushion in the heel absorbs shock and adds stability. M Select GRIP tuness each outsole with durable traction that grips when and where you need it.