The Nordica Belle Pro Ski Boots are a dream boat for gals out there looking for the epitome of stiffness. Even with a flex of 105, the women specific cuff mixed with Primaloft Insulation let your calves and feet be super comfortable and happy, so you can stay on the mountain all day. The Belle Pro's use a Custom Cork Fit Liner that along with being a great natural insulator also are a champ at transmitting power from your boot to your ski unlike other liners.