Mountain Warehouse Aspect Waterproof Boot Waterproof  Our IsoDry membrane allows your feet to breathe whilst allowing moisture to escape the shoe, keeping you comfortable when on the move 100% Rubber Outsole  Flexible and lightweight. Very long lasting Phlyon  Provides extra cushioning and flexibility, improving the overall comfort of the shoe Softshell Outer  Allows excellent freedom of movement and ventilation, great for use in warmer temperatures Mesh Lining  Improves breathability to help keep your feet fresh whilst out and about