Fortis Knee Guards - Heather Gray/Black - L/XL Hard plastic outer shell for abrasion resistance, Extra impact padding on outside of knee and calf, Perforated neoprene chassis for breathability, Strategically placed perimeter embossed foam padding with ventilation, Internal elastic flex joint maintains chassis compression during pedaling, Tacky silicone elastic webbing to prevent slippage, Hook-and-loop thigh and calf closures with security cinch, Pre-curved chassis for attack position