Flex: Stiff Flex Rating: 8 out of 10 (1 Soft - 10 Stiff) +SLIME MIDSOLE: RIDE's proprietary foam blend improves comfort and response underfoot. HDR PREMIUM SYNTHETICS RIDE's Premium PU material utilizes a proprietary resin that substantially improves durability and wear resistance. Used in high abrasion zones where bindings and board edges create focused wear, RIDE's Premium PU has unmatched performance. Ride Snowboards Men's Lasso Pro Snowboard Boot