The new and improved medium-flex Lotus Step On boot merges the game-changing quickness and convenience of Burtons Step On interface with DCs proven out-of-the-box comfort and performance. We made further improvements to the Dual Zone BOA Fit System and updated the upper design to fit and look better. With a premium R2 Liner featuring 3M Thinsulate insulation and an ultra-comfy IMPACT-ALG insole, the Lotus Step On continues to push DC to the leading edge of innovation. Step On Outsole. Dual BOA Fit System with H4 Coiler Dial. Response Liner II. Sole re-Purpose Insole. Internal Ankle Harness. Articulated Construction. BOA Silver SS Laces. 3M Thinsulate Insulation. FLEX RATING: 6/10. UPPER: SYNTHETIC. LINING: TEXTILE. OUTSOLE: EVA.