Used several times and washed. Selling as a set of 2. Retail price is 4290 yen per piece, so 8580 yen for two. Labeled as Japanese L size, US M size. Will be packaged with water damage protection. [For knee (outer side) problems during running] Limits movements that put stress on the outer side of the knee, supporting the knee during running. [Reduces stress on the outer side of the knee, common among runners] Redesigned based on user feedback to achieve a more comfortable fit. The design also focuses on functionality that doesn't interfere with running style. [Unique rotational restraint mechanism to prevent knee twisting] The film placed below the knee and the "spiral lace" that pulls up in a spiral shape prevent movements (twisting) that put stress on the knee. [Aqua Hole is used on the back of the knee to prevent stickiness from sweat] Aqua Hole is used for the fabric on the back of the knee. The uneven fabric and water-repellent treatment disperse sweat, making it comfortable and less sticky during running. *Aqua Hole is a registered trademark of Toyo Dyeing. [By wearing it on the opposite leg, it also reduces stress on the inner side of the knee, which is common among runners] By switching between the left and right legs according to your needs, it reduces stress on the outer or inner side of the knee. *Please be sure to check the left and right sides before use. #Rehabilitation #Sports #Injury #Knee #Running