Supportive enough to drive metal edged cross country skis yet flexible enough for fast and light skiing, the Fischer OTX Adventure BC has all day skiing comfort for skiing in anything from deep snow to groomed trails. Built in gaiter keeps snow out, the hinged external ankle support provides solid stability while allowing an unrestrictive flex, and the Rottefella NNN-BC has a solid connection to the binding. A warm and comfortable XC light backcountry ski boot for day touring Sizes 41 and below have a womenA'a; (TM)s fit Built in gaiter with sealed zipper keeps snow out Rotteffella BC sole works with NNN-BC bindings for maximum control Light insulation helps keep feet warm Hinged polymer cuff for great ankle support without excess restriction Fischer Nordic Boot Size Chart