La Sportiva Frost GTX Boot - Men's Synthetic Waterproof, non-wicking uppers prevent snow and moisture from saturating uppers and keep the foot dry Wide, comfortable fit for all day use EVA thermal insulating midsole reduces heat transmission and keeps your feet warm Trailon technology in the midsole provides extra longevity and abrasion resistance Ice-trek vibram sole provides grip on slippery ground and ice, and reduces ice build up on soles