242610 2mm Undersleeve with patella holeAnatech's lightweight sleeve for use under functional knee brace Made in Canada Manufactured in 2mm breathable AnaPrene for lightweight protection. May be specially ordered in thicker material or different length to accommodate specific functional bracing requirements Protects user from contact with functional brace. i. e. avoids friction or bruising helps to keep a functional brace in place Improves fit of a slightly large off the shelf functional