Internal plastic knee cap for extra protection and impact energy reduction Aramid lattice covered knee for added durability Precurved fit for ultimate comfort One piece foam section for increased durability and perfect fit Top center adjust strap system allows for even adjustment and increased blood circulation Rear lower center adjust strap system sits above calf muscle and allows for even set and forget adjustment TPR offset adjustment tabs allow for full range of adjustment Open back section for added comfort and spandex lower for increased fit performance Tested beyond CE EN 1621-1:2012 Level 1