Product Description The DC Phase Boa Snowboard Boots are a longtime favorite with some cool upgrades. Fit for navigating snowy planets with surefooted confidence, the Phase Boa boasts an overhauled construction with a more reliable H4 coiler to help you dial in the perfect fit, Sequence(TM) technology, and a weight-reducing UniLite(TM) outsole. Additional Details and Features Flex Rating : 4 (on a scale of 1-10, with 1 being the softest, 10 being the stiffest) Foundation UniLite(TM) Outsole Response Liner I IMPACT ALG Insole BOA(R) Silver SS Laces