This product is a Knee Support, Elastic, Adjustable, Joint Ligament Protection, Knee Pad, Pain Relief, Injury Prevention, Breathable, Black Sports, Fixed, Unisex/Left and Right, Outdoor, Mountaineering Knee Support, Knee Stabilizer, Unisex, 1 piece Product Name: Knee Support Material: SBR Composite Size (approx.): 35cm-50cm (circumference 10cm above the center of the knee) Color: Black, Green, Orange, Blue (Please specify the color in a message when purchasing.) Remarks: Prevents injuries during running, basketball, etc., protects joint ligaments in outdoor sports such as mountain climbing, baseball, marathon, golf, and tennis, and alleviates knee pain. A thin, versatile knee support for exercise.