Description WATERPROOF: Waterproof shell keeps out rain, slush, and snow, while still allowing airflow. PVC & fluorine free. Fabric Waterproof Rating: 10000 mm INSULATED: Super cozy with Sherpa lining and insulated middle layer ME-PUT-ON: Easy to put on with exterior shoe tongue placement and generously sized hook-n-loop closure. LIGHTWEIGHT: Lightweight, prevents trips and slips FLEXIBLE:Flexible sole design supports healthy feet growth. SAFE: Slip resistant rubber outsole with toe cap for extra protection. SIZES (US): 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 Size UP if in doubt.