Designed to provide added patellar support, the Donut Buttress is used to surround the patella in both the Patella Stabilizer knee brace and the Hinged Knee Brace. The Donut Buttress is made of a dense medical-grade foam that is sturdy and comfortable. The buttress diameter is 3-3/4 inches and only 1/3 inch thick. Note: The Donut Buttress is only replaceable in the Ultima versions of the Patella Stabilizer and Hinged Knee Brace - Pull on.

Tri-laminate Technology
Three-layered fabric construction for enhanced durability, comfort, and flexibility.

Hypoallergenic
Hypoallergenic materials mean everyone can wear BioSkin braces.

Lightweight
At only one millimeter thick, our braces are ultralight compared to the competition.
Care: Hand wash in cold water and then hang to dry.