Class 1 medical device. FSA eligible. (1) Helps relieve pain, tingling, and numbness associated with carpal tunnel syndrome, arthritis, tendonitis and repetitive motion stress or injury. (2) Unique 360 degree design provides rigid stability above and below the wrist while providing maximum circulation while sleeping. (3) Contains 2 internal metal supports. (4) Beaded cushion supports palm. (5) Antimicrobial (Antimicrobial treatment is intended to protect the brace and does not extend protection to the skin). Sizing: Adjustable - one size fits most, fits left or right wrist. Measure circumference of the wrist. 5.7 - 9.0 in / 14.6 - 22.8 cm. Not made with natural rubber latex. 3-in-1. (1) Provides protective support to wrist. (2) Supports the wrist to aid in the treatment of carpal tunnel syndrome. (3) Supports the wrist to aid in the treatment of rheumatoid arthritis. Since 1959 the Mueller family has been the trusted leader in sports medicine. We are dedicated to creating the highest quality products that help people recover and perform at their peak. Engineered in Wisconsin by Mueller Sports Medicine. Trusted brand. Family owned since 1959.