O'Neal RDX Boots (Black, Size 8) Aluminum body "Vice Ratchet Strap" ensures the perfect, secure fit around the ankle. "Full Tilt RDX Pivot System" allows maximum forward and rear motion Adjustable shin plate in 3 settings for a custom fit. "Army Rubber" bonded sole with heavy duty adhesive and a hidden reinforced lock stitch. 3 Aluminum Alloy double pin and "Lock Snap" buckles Vertical height adjustment allows a custom fit for taller riders. 3 piece super grip heat resistant rubber plates Extended length steel shank. Slim toe box height for the perfect shift Dual compound rubber/plastic for extra flex at the bottom of the shin plate. Replacement ratchet, straps, buckles, rubber sole, foot bed insert, boot upper body and service kit are available