WATERPROOF: KEEN.DRY waterproof breathable membrane keeps your feet dry and comfortable all day long by allowing vapor out without letting water in INSULATED: KEEN.WARM 200G insulation helps keep feet warm in temperatures down to -25° F / -32° C but still allows feet to breathe; Heat reflecting board provides a thermal underfoot barrier to help lock in warmth SOLE: Higher traction lightweight KEEN.Fusion rubber helps give them the sure footing needed for all day play MATERIAL: Fleece lining for soft warmth; Lace lock bungee capture system provides a secure fit while offering a quick and easy way to get footwear on and off TOE PROTECTION & CARE: High abrasion rubber tip for added durability and protection; Gently brush with a soft damp sponge to remove loose dirt; Treat stains right away with a gentle cleaner; Air dry away from heat