Boot Glove was designed and tested to -20 degrees F. in the frigid Alaskan Arctic. This thermally insulated neoprene glove for your boots will keep your feet warm in extreme wind and snow chill situations. The Boot Glove is Water proof and has a velcro adjustable rear strap. Limited quantity on Universal. Alpine: is for Ski Boots. MD 7-10.5 W, 6-10 M, LG 9.5 and up W, 9-15 M.