Warm, lightweight, and glove friendly adjustments make the Rocket Winter Boot the kids' all-round winter favorite. Sledding, building a snow fort or just running around all day in the snow is what they're designed for. A lace-lock collar keeps the snow out. A removable 3-layer moisture wicking 8 mm Zylex® liner keeps their feet cozy and dry. Durable construction keeps you happy. Water Resistant. Rated for -40°.Glove friendly adjustable midfoot velcro strap.NiteRays reflective technology for added safety.Waterproof, lightweight and flexible synthetic rubber shell.Kamik's SNOWAVE synthetic rubber outsole.Rated to -40F/-40C.Avg. weight for pair: 1.68 lbs..