The Hydra Thermagraph (R) Pant boasts the 686 Thermagraph (R) Warm Lining System with Body-Mapped Insulation, giving you the best of both worlds: the warmth of insulated pants and the temperature control of a shell. Insulated panels through the seat and knees ensure the places where your body comes in contact with cold surfaces -chairlifts and snow -is insulated, while large shell zones create superior heat and moisture management. This innovative lining system, coupled with Air-Flo (TM) inner leg vents, makes the Hydra Thermagraph (R) Pant perfect for braving the coldest winter days without overheating during warm spring sessions. 686 Hydra Thermagraph Pants Mens | Black | Large | Christy Sports