The Active U is the same boot as Madshuss well-received Active C classic boot, but fitted with a universal ankle cuff for added stability when skating and more confidence to handle downhills in either technique. A modified heel construction contributes to holding your foot in place, particularly helpful for newer skiers who havent yet built up their ankle strength. Combined with a flexible forefoot construction and a waterproof, breathable lace cover let you ski comfortably all day long, whether you choose to skate or stride.