"The Perfect Fit Women's Specific Liner easily adapts to the shape of your foot once it is heated for a truly dialed in fit just for you, and is lined with fleece to keep you warm and comfortable all day. The Edge 90 W's 80 flex rating is supportive enough for aggressive skiers, but can be dialed back with the flex adjustment. Head has made the shell very easy to slide on an off with an easy entry shell design. If you want a performance boot that has some do it yourself adjustments, the Head Adaptive Edge 90 W will be a great boot for you. Adaptive Fit Technology Easy Entry Shell Design Adjustable Spoiler Softwalk Heel and Grip System Women's Perfect Fit HP Liner Fleece Lining 30mm Velcro Strap Best Fits a Medium to Narrow Forefoot and Medium to Wide Shaft of the Leg"