Product Description The ultra-lightweight, medium-flex Control is one of our best-selling all mountain boots, and this year we made it even better. We added eco-friendly and ultra-comfy IMPACT-ALG(TM) insoles and a grippy Unilite(TM) outsole for enhanced board feel. And when you combine the precise fit and board control of the industry-leading Dual Zone BOA(R) Fit System with our premium R2 liner, you get a boot that elevates your game at each and every turn. Additional Details and Features Flex rating : 4 (on a scale of 1-10, with 1 being the softest, 10 being the stiffest) Dial in the perfect fit with the Boa(R) Fit System with H4 Coiler dial Zonal Closure allows you to tighten and or loosen specific zones of your boots using individual dials to find that perfect fit for your performance and comfort needs Response Liner II is lightweight and offers high performance with a 360deg Power Strap and cushy EVA foam Sole re-Purpose insoles consist of recycled materials Internal ankle harnesses built into the interiors of the boot shells help keep the boot liners in place and aid in preventing heel lift Articulated construction allows even flex throughout the boots and helps to minimize both hot spots and boot wear Contact UniLite(TM) rubber outsoles