The Perfect Storm Cloud Hi kid's insulated boot is 100% waterproof from top to bottom. This boot is fully insulated with 7 mm neoprene to keep feet warm in the coldest conditions. It is comfort rated to -30F. The non-marking and non-slip outsole offers superior traction in all climatic conditions. The Patented Perform Shield® Handle keeps unwanted seasonal elements away. The removable EVA insole provides cushioning and eases of cleaning.