The Neo G Hinged Open Knee Support offers a two point geared hinge system to help control flexion and extension movements whilst helping reduce unwanted medial and lateral instability. The open patella area helps with patellar tracking problems. Featuring three adjustable straps, the support helps provide maximum joint protection and stability, making it suitable for use during rehabilitation following trauma or surgery. Weight bearing pressure during movement is more evenly distributed over the joint helping with arthritic and meniscus pain. The durable, heat therapeutic neoprene helps with arthritic knees, chronic aches and stiffness. Fits up to 56cm / 22In. Measure thigh circumference 4 Inches above knee for maximum size.