The Flow guards are the ideal option if you are looking for super-thin, light and comfortable knee protectors. These pads are designed to be compact to fit in any backpack. The integrated XmatterTM padding concept provides high-impact absorption and protection, and the AeroMeshTM adds a higher level of comfort and structural strength. The Flow guards also allow you to remove the padding should you need to throw the sleeve in the wash or replace padding which has lost its structural integrity.