This is a knee support from COZZIN. The Amazon description is as follows: * It uses EVA material, which is highly elastic, flexible, and environmentally friendly. It has a function to reduce knee vibrations and relieve pressure, distributing pressure on the knee and stabilizing the patella. * It is exceptionally comfortable, making it ideal for various sports such as jogging, running, baseball, and cycling, as well as for gym workouts and yoga. * It provides a secure fit for all knees with elastic nylon and strong adhesive Velcro straps. * It is breathable and moisture-resistant, preventing stuffiness even when worn all day, ensuring comfort during long-term use. * It is very lightweight and can be stored compactly. It is also durable and weather-resistant, allowing for worry-free use. Reference: https://www.amazon.co.jp/dp/B07CLLYVBV?ref=cm_sw_r_cso_li_apin_dp_9ERGCS2Z7ZZVNDA90CZT&ref_=cm_sw_r_cso_li_apin_dp_9ERGCS2Z7ZZVNDA90CZT&social_share=cm_sw_r_cso_li_apin_dp_9ERGCS2Z7ZZVNDA90CZT&openExternalBrowser=1