Holding down the top ladies' spot in Black Diamond's lightweight Alpine Tour Series, the Swift Women's Alpine Touring Boot is made to help you cover serious ground and put tracks in steep, deep, and technical lines from California to Chamonix. Made of light Triax plastic, a single boot weighs just over three pounds, and uses a Triax Pivot frame design to provide 40 of cuff rotation for a smooth, natural stride and easy skinning. The wide V shaped 103mm last keeps your toes comfortable and your heels locked in place during long, demanding days in the backcountry, and the women's specific Efficient Fit AT Light liner is fully heat moldable, so you dial up the perfect fit for all day comfort and performance. Black Diamond also hooked the liner up with fully taped seams for extra warmth, included articulated flex zones for smooth touring performance, and integrated a plastic tongue for a smooth, even flex that'll stay consistent in all temperatures. Add that to the Swift's do it all 100 flex, rockered rubber sole with integrated tech fittings, and Quickwire buckles and power strap, and you've got a boot that'll handle long approaches, steep climbs, and techy descents with ease, keeping your toes warm and comfortable all the while.