Design: Waterproof DriDefense membrane nylon and synthetic leather upper HEAT-MX(TM) 145 sustainable thermal insulation Bungee lacing system with Easy-Grab Lace Lock for a secure, kid-friendly fit Padded collar and tongue add comfort and protection NiteRays reflective technology provides added safety when it gets dark In-Shoe Comfort: Removable CushyStep Everyday EVA foam footbed adds comfort and support Moisture wicking fleece lining for comfortable all-day wear Lightweight, comfortable EVA FOAM midsole Durability & Traction: SNOWBELT durable synthetic rubber sole for traction Deep, self-cleaning treads with GripXT, for stability in snowy conditions Additional Details: Comfortable down to -40degF Vegan-friendly Height: 7.7 in Weight: 1.53 lbs per pair Circumference: 9.45 in (size 12)