Mueller Self-Adjusting Knee Stabilizer crosses your knee with comfort and support This innovative knee stabilizer is designed with integrated, criss-cross stretch straps above and below the kneecap, providing a custom fit and comforting compression as you move. Flexible steel springs on each side of the stabilizer, combined with a U-shaped buttress and open patella, provide added support and relief for weak, injured or arthritic knees. Breathable fabric makes this stabilizer comfortable to wear all day. Note: May contain natural rubber latex.