1/8" neoprene construction with sewn-in tubular patella buttress and removable dual-axis polycentric hinges for additional medial/lateral support. Adjustable superior/inferior straps for compression and stability. Ideal for medial/lateral instabilities with patella tendonitis, chondromalacia, subluxation, grade 1 collateral ligament sprains.- Patella Stabilizer, Small 15"-18", Black Mfr. Direct