Mueller Elastic Knee Stabilizer Moderate Large/X-Large

2 steel stabilizing springs on each side of the leg provide firm support. Provides medial/lateral support and is ideal for stiff, weak, or sore knees. Open patella keeps kneecap in place. Breathable fabric for comfortable all-day wear. Contoured design prevents bunching and slippage while allowing full range of movement. Fits left or right. Product Benefits.