Product Description The DC Phase Boa Snowboard Boots incorporate all the elements you need to hit the slopes with maximum confidence. Durable construction, warm, heat moldable liners, and a user friendly H4 Coiler Boa closure system mean these boots are ready to shred hard all season long. 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