Manufacturer states, "The strap applies pressure upon…
Price Paid: $20
Manufacturer states, "The strap applies pressure upon the patellar tendon below the kneecap to stabilize and tighten up the subluxation. It adds further strengthening to the kneecap mechanism by applying pressure on the tendon above the kneecap as well."
Not exactly sure what this all means but I DO KNOW that it WORKS!
Easily adjusted with velcro straps. Very soft and comfortable, weighing on 3 oz. for size Medium.