WATERPROOF: From top to bottom, the BOGS Grasp boot is 100% waterproof which ensures your little one’s feet stay dry during school recess, daily commutes or simply playing outdoors in winter weather conditions. Great for wet, mud, snow, muck, and other tough conditions! INSULATED: Constructed with 5mm Neo-Tech waterproof insulation, to repel moisture and keep feet warm and protected. Comfort rated to -22F / -30C. Ideal in cold conditions, helping keep your little ones feet warm and dry!