These lightweight, insulated ski pants. are designed with exceptional weather protection for the legs when you prioritize time on the mountain. These fully waterproof, breathable, fully seam sealed Helly Tech® Performance 2L mechanical stretch ski pants which keeps you dry, warm and comfortable is a clear winner for many years. Features Primaloft® insulation with exceptional thermal regulation and to control the heat we added mechanical venting to keep you warm or cool depending on the conditions and activity.