The mtr knee guard insert combines koroyd with foam to balance lightweight breathability and flexible comfort for certified protectionsilicone grippers keep the pad in place and the low profile minimalist construction wont interfere with your shortsthis unique system exceeds en1621 1 in a wear it all day package koroyd technology engineered protection tens of thousands of co polymer extruded tubes thermally welded to create an unparalleled consistent and fully engineered core ready to be