Brian's SubZero Pro 3 Chest & Arm utilizes lightweight construction with an ultra lightweight airknit and nylon exterior, a fully adjustable throat collar includes the Hex-Air cushion, which is a fully adjustable collar featuring the X-static lined hex-air for improved air flow, & a sternum plate comprised of high density foam. Full flex elbow blocks have been re-designed to provide a greater range of motion. Smart strap closure and shoulder adjustments. Extended high-density lateral protection. Multi-point strap adjustments provide a customizable fit. High density spinal pad protects the spine during gameplay.