Our XL 4.0 Knee Brace comes equipped with dual side memory spring stabilizers (4 springs) to provide balanced compression and stability for your knee and patella. This support helps alleviate pressure on the knee joint during intense activities, offering relief from knee pain, ACL, MCL, arthritis, strains, sprains, and meniscus tears. It's an ideal option for sports safety and recovery. Designed with ergonomic curves and an open patella, this knee brace ensures a snug fit that moves with your knee joint.Except Xl size,we also have other size ，if u want, u can conact us.