This lightweight stabilizer provides medial/lateral support and is ideal for stiff, weak, or sore knees. Flexible steel springs provide firm support without restricting mobility. Helps relieve pain and swelling while keeping your knee flexible. The contour design prevents bunching and slippage, ensuring a proper fit. Reinforced trimmed edges improve durability. Measure around center of knee: (SM/MD 12 - 16 in ? 30 - 40 cm).