FLOW ZIP KNEE GUARDS GREY: These are lightweight, comfortable, and space - saving knee protectors. Their standout feature is the flexible and easy - access Flex - Zip zipper. They're incredibly compact, so you can stash them in your pack with plenty of room left. The integrated Xmatter padding offers excellent high - impact absorption and protection. The Aero Mesh™ fabric not only enhances comfort but also adds structural strength. It's sweat - proof and perfect for cycling. Key features include: X - matter™ protective foam (exchangeable and removable), Flex - Zip zipper, Aero Mesh™ (light, moisture - wicking, breathable, anti - bacterial), Loop - Lock™ closures, silicone stopper. Available in sizes S, M, L, XL, XXL. Size details: for circumference (measured one hand width above the knee in cm), S is 38 - 40, M is 40 - 42, L is 42 - 44, XL is 44 - 46, XXL is 46 - 48. For the distance from knee to ankle (cm), S is 40 - 41, M is 42 - 43, L is 44 - 45, XL and XXL are 46+. Replacement Inserts: iXS X - Matter Flow Knee Guard Innavidual Replacement Insert.

Using these knee guards is a breeze. First, unzip the Flex - Zip zipper and slide the guard onto your knee. Make sure the padding is properly positioned over your kneecap. Then, use the Loop - Lock™ closures to secure the guard tightly. The silicone stopper helps keep it in place during movement. When it comes to maintenance, the Aero Mesh™ fabric is breathable and anti - bacterial, but it's still a good idea to wash it regularly. You can hand - wash it in mild detergent and let it air - dry. The X - matter™ protective foam is exchangeable and removable, so if it gets worn out or damaged, you can easily replace it with a new insert. Just remember to check the size of your knees regularly as your body might change, and make sure you're using the right size guard for the best protection.