Performance mittens, the Index are constructed in waterproof, windproof & breathable Milatex fabric for excellent levels of weather protection. They are also insulated for added warmth & comfort. Technical details on the Index mittens include wrist & cuff adjustment, reinforced palm for added durability, & a soft wipe thumb with goggle wipe. They also clip together when not in use to avoid one of the mittens getting lost. A great choice for your next holiday in the snow.