Built with pro grade durability for alpine conditions, the 509 Velo Raid Boot is for sledders and snow bikers seeking more support and protection with minimal bulk. It features a taller profile to guard your shins, plus the ease of a motocross style three buckle closure. The 5Tech waterproof lining with 200 3M Thinsulate insulation keeps you warm and dry on the deepest days. Shifter pads and a carbon blend mountain lug sole ramp up strength in critical zones. Features: Fits half size smaller due to secondary liner installed inside the boot, beneath primary liner liners are removable 3 Buckle boot construction 5Tech water proof bladder construction Lining secured with 200 grams of Thinsulate insulation for a warmer construction Mountain lug sole, carbon content optimized for maximum durability Shin guards Shifter pads to increase durability Premium performance lasting board Premium performance heel cup for ankle support 509 Velo Raid Boots