Bought these for my husband to wear here at high altitude in Colorado. The day after they arrived it snow about 1 1/2 feet over night. My husband wore these while using his snow blower on our very large area to be cleared.  He gave them high praise and explained that his feet were warm and dry. The inner liners cushion feet for comfort and warmth; plus, his feet did not get damp from perspiration.  A winner purchase!