Design: Waterproof DriDefense membrane nylon and synthetic leather upper HEAT-MX(TM) 90 sustainable thermal insulation keeps your feet warm in wintery conditions Odor-eliminating treatment Gaiter D-ring In-Shoe Comfort: Sustainable BLOOM(TM) RISE EVA foam midsole adds comfort and support Moisture wicking fleece lining for comfortable all-day wear Ortholite(R) Hybrid(TM) ultimate eco-friendly comfort footbed Durability & Traction: TREADLITE synthetic rubber outsole uses deep lugs with GripXT for superior traction in any conditions Additional Details: Comfortable down to -4degF Vegan-friendly Height: 7.48 in Weight: 1.83 lbs per pair Circumference: 9.05 in (size 7)