The JT eMotion knee/shin guards are the only floating-knee protection of their kind. The sliding rail system [patent pending] is the key to holding you in place. When you move, they move, keeping your knee and shin securely covered while your running, jumping or sliding. Constructed of our compression formed puncture-resistant Rhino-Hyde¿, coupled with non-slip inner pads to keep you secure and elastic hook & loop closures.