Knee Immobilizer. 20" (Measure at mid patella with fully extended leg). 3/8" pile covered foam combined with alternating elastic straps make the brace easy to apply and adjust. Reinforced, moldable posterior stays provide additional rigidity. 2 Medial and 2 lateral movable stay pods offer extra support. 2 Contact closure application straps. Five elastic adjustment straps provide added compression. Pile exterior is hook & loop sensitive for easy adjustment.