Troy Lee Designs BG 5900 Chest ProtectorThe contoured fit makes wearing the CP5900 under the jersey virtually unnoticeable. The design of the CP5900 provides protection in a comfortable ergonomic design. TLD Chest Protector Specifications: NECK BRACE INTEGRATION patent-pending design is compatible with leading neck braces without compromising fit and protection. VENT-TRAK circulates air through flexible channel over the skin surface to cool the rider. VENTED SOFT-YOKE CONNECTION between front and back plates offers unprecedented fit and comfort. LOW PROFILE DESIGN eliminates bulk to fit under or over jersey. HINGED CHEST PLATES provide extended rib coverage, better fit and maintains proper positioning in crash situations. Covers the chest, ribs, back, clavicle. Convenient strap locations and integrated fast-lock buckles for easy function. Buy Troy Lee Body Armour from Chain Reaction Cycles, the Worlds Largest Online Bike Store.