Dial Up your Performance Fit. For the ladies who know that a good day on the hill starts with being comfortable, the Mach BOA 85 W is your new best friend. Featuring a medium-volume, anatomically shaped lower shell designed specifically to work with the BOA® Fit System -- the MachBOA 85 W provides a Dialed-In Precision Fit. A plush, anatomically shaped liner provides unparalleled comfort inside the boot, so you focus on having an epic day on the mountain. Flex: 85mm Last: 100mm Volume: MV Features: Liner: Ecodesign - W.S.D. Sport - N.F.S. Adaptive - Celliant® Soles: Gripwalk (ISO 23223) Shell: PP - C.A.S. with Quick Instep Cuff: PP - W.S.D. Mechanical Cuff Adapt Buckles: 2 Micro Adjustable Aluminum Cuff Buckles, Shell BOA® Fit System Powerstrap: 35 mm Velcro Strap Forward lean: 12.0°