DAIYA bonbone Thin Knee Back Cross XG Free Size Black, Daiya Industry Retail Price: ¥4730 From the official page: ・By changing the pulling force of the support belt, it can address various knee problems. ・The moderately elastic cross belt supports the stability of the knee joint. ・The pad built into the back of the knee prevents localized pressure from the belt and assists in limiting flexion. ・The main body uses a thin, non-slip material that is resistant to slipping and has good breathability. ■Recommended for those who: ・Feel discomfort when bending their knee. ・Are concerned about knee instability. ・Are troubled by knee varus/valgus issues. ■Applicable Range: [10cm above the knee circumference] M-L (Free): 35-50cm [Total Length] M-L (Free): 48cm [Length] 21cm I bought this after being recommended by a friend who is a chiropractor, but I don't need it, so I'm selling it. I am open to price negotiations. If you are considering purchasing, please feel free to comment.