The Tecnica Women's Cochise Pro Dyn Alpine Touring Boot is the stiffest backcountry ski boot sized specifically for females. Since all Cochise boots feature C. A. S. technology for easy custom boot-fitting, you could opt for some of the stiffer Cochise boots, but this option is the stiffest boot with a female-friendly shape right out of the box. Its 115 flex gives the stiffness that most skiers look for, and Tecnica's T-Ride walk mode has a unique locking switch that increases security in downhill mode.
