K2 Bfc 90 GW Ski Boots 2023K2 BFC 90 GW men's ski boots Flex Index 90 Last width 103 mm K2 offers the all new BFC 90 for skiers who prioritize ease of use above all else when it comes to their boots. The softer 90 flex range is forgiving and easy to handle for improving technique and all day, all conditions skiing. Hands Free Entry makes getting them on (and off) super easy, and K2's Cushfit Comfort liner delivers plenty of comfort and wiggle room for your toes. BFC means Built