7 Protections Flex Knee Pads feature two layers of protection covered by a tough outer fabric make for a flexible and hardwearing pad. Shaped to fit the knee in a riding position you will forget the pads are there. 7 Protections center strap system means even pressure around the lower thigh and a second strap sitting above the calf muscle means everything stays where it should. It also features an open back design that maintains airflow and reduces any sweat build-up is a key feature for kneepads. The Flex pads have an open back section to allow sweat to evaporate away.