ION K-Pact Amp HD Knee Pads For Progressive Downhill and Freeride Mountain biking can be rough on your body. If you're aggressively riding, then you might want to wear some aggressive protection so you can ride with confidence. The ION K-Pact Amp HD Knee Pads extend the protection further down the shin with a SAS-TEC pad for heavy-impact protection. They feature Power Slide caps on the knee that enhance durability, an Ergo Strap that is comfortable, breathable mesh inserts, and lightweight EVA side padding. Features Power Slide Caps on the knee that enhance durability Ergo Strap that is placed above the calf and adapts to the anatomical shape of the knee area Lightweight EVA side padding that is flexible and provides protection where you need it Sizing Size Small Medium Large Extra Large XX-Large10cm Above Knee (in)14. 8 - 16. 5"16. 5 - 17. 4"17. 4 - 18. 3"18. 3 - 19. 2"18. 3 - 19. 2"15cm Below Knee (in)13. 2 - 14. 2"14. 2 - 15. 1"15. 1 - 16"16" - 16. 9"16. 9 - 18. 1" | Ion | K-Pact Amp Hd Knee Pads Men's | Size Medium In 900 Black