The seven idp index knee guard while the index knee is the lsquoentryrsquo pointrsquo into the 7idp family it doesnrsquot mean that itrsquos in any way entry level the index knee is brimming with innovative design concepts seven idp index knee guard features x profile cap for narrow profile fit low weight high strength 1mm cap for superior fit and pedal motion double layer polygon perforated custom foam to increase air flow and reduce weight upper calf muscle suppor