Swany X-Cell Under Mitts - Women's: The Tri-plex insulation system with a Volcotek Heat Shield makes the X-Cell Under Mitt extremely warm. Some of the features are Pre-Curved Construction, Pull on Loop, and a utility heat pocket. The waterproof and breathable insert will keep you dry while on the slopes. SHELL: Smooth Grain LeatherShield Nubuck Leather with Reinforced Digitized Palm. INSULATION: Tri-Plex Insulation System: Volcotek Heat Shield DynaTherm Lining, DryfingerA(R) II Waterproof/Breathable Insert. FEATURES: Pre-Curved Construction Hook and Loop Tab Pull on Loop Utility Heat Pocket with AquaGuard Lock-Down Zipper and Swany Leash.