Beardo Ski Mask HD, Sugar Skull Backcountry & Park Tested. The Worlds Only 360 degree Seamless HD design. Anti-Microbial Material - clean and stink-free! Fresh Air Breathe Hole. Anti-Fog protection when used with Goggles (sold separately). Element-repelling Flex Material. O/S Stretchable Polyester. Soft fleece lining - for temperature regulation. Various designs available. Patented design.