Keeps feet warm and dry ÿ Outer shell made from light weight synthetic recyclable rubber ÿ Flexible ultra-light midsole and integrated premium rubber compound outsole forÿsuperior arch supportÿand for more comfort ÿ Uppers made from double weave 900 denier nylon ÿ Five layers of inner boot ÿ Comfort rated to - 40oC/- 40oF