This brace involves a knee sleeve with an opening for the patella and straps or buttressing around the opening. This may limit movement of the patella, thereby reducing the likelihood of patellar subluxation or dislocation. They may also include hinge along the sides of the knee to provide an additional sense of stability. While definitive evidence is lacking, these braces may reduce pain for some individuals with patellofemoral pain due to improper tracking of the patella.