Troy Lee Designs is the place where "The World's Fastest Racers" go when only the best will do. 4 mm D3O® padding insert. Increased performance advantage over 10 mm HDPE foam. 360-degree seamless construction for comfort. Durable abrasion-resistant cover. Reflective print logos. Silicone gripper band. Sold as a pair, left and right. Sizing: XS / SM: 13.5 - 15.5" (34.5 - 39.5 cm) lower thigh, 12.5 - 14.5" top calf (32 - 37 cm). MD / LG: 15.5 - 17.5" (39.5 - 44.5 cm) lower thigh, 14.5 - 16.5" top calf (37 - 42 cm). XL / 2XL: 17.5 - 19.5" (44.5 - 49.5 cm) lower thigh, 16.5 - 18.5" top calf (42 - 47 cm). Note: Thigh measurement: 4" above knee cap center. Calf measurement: 6" below knee cap center.