Design: Waterproof DriDefense membrane nylon upper Faux fur snow collar and gusset tongue comfortably protect the foot Bungee lacing system with Easy-Grab Lace Lock for kid-friendly on and off NiteRays reflective technology for added safety In-Shoe Comfort: HEAT-MX(TM) sustainable thermal insulation with foam insulation to keep the feet warm Moisture wicking soft boa lining for all-day comfort Removable boa-lined EVA footbed offers long lasting support Durability & Traction: SNOWTRAIL synthetic rubber sole and midsole High abrasion resistance and flexibility in snowy conditions Additional Details: Comfortable down to -40degF Vegan-friendly