Rubberized ventilated outer skin Per-curved chassis for attack position Tacky silicone elastic webbing to prevent slippage Internal elastic flex joint maintains chassis compression during pedaling Fully ventilated plastic protective cup with high impact absorption Strategically placed perimeter embossed foam padding with ventilation Calf cinch for added security Thigh cinch for customizable fit and security. KNEEGRD SURPASS GY/BK XL