No not just because they flex. The design of the boot, the way it wraps around your foot really well, The shock that gets absorbed from the foot boards, and yes the natural flex feeling it gives is why it's such a damn good boot. Also the tongues that "flex" are interchangeable to increase or decrease stiffness in the flex itself. Also another reason but not a major reason is the cosmetic designs! These are best looking and best performing boot on the market. You want proof Seth Morrison uses them. That's all the convincing I need. That's all you should need to. Just pick the kind of skiing you do and decide on the boot that's right for you @
www.fulltiltboots.com
happy hunting!