Set of two. Not sold separately. L-size supporter made with far-infrared material to keep your knees warm and reduce strain. - Model Name: Knee Supporter - Size: L (around the knee approx. 36cm〜42cm) - Material: Far-infrared material - Function: Gently warms the knee and reduces strain - Quantity: 1 piece The other white one is thin. This is a Daiso product. I haven't used it since I bought it, so please take it if you'd like. Please see my profile. Thank you for looking.