Inzer Knee Wraps - Iron Z Powerlifting Knee Wraps (Pair) Super tight, extreme rubber strand design for the ultimate rebound; Designed to grip the skin therefore eliminate the need for chalking the knees to keep them in place. Does not slip around on itself as is known of other wraps; Gets tighter, easier, during the movement even when not wrapped to total tightness; When wrapped to total tightness, generates the most energy and power of any wraps in the world; Smoke all your lifts with Iron Z Wraps!