Features of the Salomon Men's X Ultra 4 Mid Winter TS CSWP Boot Designed to power through uphills and descents, the X ULTRA is now available in an all-winter version Just as agile as a trail-running shoe, it offers all the stability, grip and protective comfort you need to tackle wintery terrain and cold temperatures Not to mention cozy 3M Thinsulate Insulation We've added a grippy Winter Contagrip Outsole that thrives in the ice and cold, as well as a gaiter hook if you need more protection Keep warm and dry with 3M Thinsulate 2g Insulation, a CS waterproof membrane and cozy liner ADV-C Chassis targets articulations on the outer foot to optimize stability without limiting your mobility ClimaSalomon Waterproof: A flexible, lightweight, full waterproof bootie to ensure complete weather protection Thinsulate 2gr: Thin, warm, light and durable, 2 gram Thinsulate Insulation for Footwear is recommended for cool conditions or for High activity levels where the weArer generates a lot of body heat Contagrip W: For all winter applications, Contagrip W Uses a unique compound that maintains adhesion in freezing temperatures Lug patterns depend on usage