Fox Enduro Knee Sleeve Pedal hard, stay protected The Fox Enduro Knee Sleeves are designed for riders who earn their turns and pedal up before sending it back down, and who need a lighter-weight option for protection on technical terrain. The Enduro Knee Sleeves feature high-tech D30(R) protective inserts that harden upon impact, while staying flexible during pedaling. The lightweight slip-on design of the Enduro Knee Sleeves helps to reduce bulk, with a micro-Lycra stretch design with silicone grippers at the top and bottom to keep the sleeves secure. A nylon mesh rear panel increases airflow, keeping the air moving so you won't get bogged down while pedaling uphill. Features Removable D30(R) protective insertsfor high-tech impact protection that doesn't slow you down Nylon mesh rear panel increases breathability Slip-on micro-Lycra stretch construction for a snug, comfortable fit Silicone-grip top and bottom to keep the sleeves in place Sizing Size Small Medium Large XLThigh Circumference (4" above knee) (in)15. 5 - 16. 5"16. 5 - 17. 5"17. 5 - 18. 5"18. 5 - 19. 5"Calf Circumference (fullest part) (in)13. 5 - 14. 5"14 - 15"14. 5 - 15. 5"15 - 16" | Fox Apparel | Enduro Knee Sleeve Men's | Size Extra Large In Black | Nylon