The boys from Milcomp visited us in order to test the APC556 PDW. Here is their review:
5.11 Tactical Series knee pad EXO.K1
Made specifically to take the brunt of the pressure on your knees the EXO.K1 Knee Pads feature a molded, flexible cap with built-in traction and a flat face for a stable, quiet shooting platform - even on hard surfaces. Beneath the cap is an EVA foam pad for shock absorption and even more protection. A thick woven upper elastic strap and polypropylene lower strap make for a secure fit. Adjustable, silent straps are designed to stay in place without slipping. Stay focused on your mission and not your knees with the
EXO.K1 Knee Pads.
Follow the instructions of the manufacturer