Self-setting D-rings make this an easy-on, easy-off brace. Padded cotton stockinette lining and foam construction provides extra comfort. Includes an aluminum stay.Recommended for arthritis, sprains or relief from the symptoms of carpal tunnel syndrome. Specially designed D-rings self-lock to ensure that the brace will not open completely, making it easier to put on and take off. Removable aluminum stay provides volar support. The Long Liberty™ D-ring model provides additional forearm length for increased leverage and support. Hand wash with mild soap and air dry. Remove aluminum stay before washing. Measure circumference at wrist crease to determine size. X-Small Up to 5-3/4in (Up to 15cm) Small 5in to 6in (15 to 17cm) Medium 6in to 7in (17 to 19cm) Large 7in to 8in (20 to 22cm) X-Large Over 8in (Over 22cm)