Waterproof leather uppers, that are 1.5mm thick. Molded Rubber toe provides durability and protection. TPU molded heel for Snowshoe strap compatibility. 200 grams of Thinsulate® Insulation treated with M Select Fresh odor control. Bellow Tongue for improved security and debris protection. M Select Dry waterproof construction seals out water and lets moisture escape keeping your feet cool and dry. Merrell air cushion in the heel absorbs shock and adds stability. EVA midsole for increased cushioning and support. Grade 3 Nylon Insole for trail hiking. Active Heat EVA footbed for improved cushioning and support. 4mm Lug height. M Select ICE GRIP outsole for improved traction.