SHIFT™ allows for the interior padding to stay connected to your thigh while an exterior shield moves with your leg effortlessly. This enhances coverage for better 1KD (one knee down) protection The next generation LINQ X™ pivoting hinge system allows a player to strap these on and completely forget about them while blocking, throwing and running. The interlocking knee and thigh components offer specialized coverage for the areas exposed in the 1KD stance. The hinge design rotates with your knee through the entire range of flexion for uncompromised security and fit Innovative Delta Flex® calf harness' clip directly to the leg guard for the most secure and comfortable leg guard in baseball history CON4M® allows you to customize the shin length between 16.5" - 17.5" for the perfect fit