Neoprene Free, No Smell, Latex Free, Hypo-allergenic. Made by 3D breathable, soft touch, elastic Patented OK-spacer fabric. Inside brace is made by quick dry moisture wicking yarn. 24 hours comfort use. Please kindly check size before buying. Small size fit wrist circumference 4.5 to 6.5 inches. 3 inch to 4 inches for the length from the end of thumb to wrist. Regular size fit wrist circumference 6.5 to 10 inches. 4 inch to 5 inches for the length from the end of thumb to wrist. (please check the drawing). Adjustable design, fits both hands US FDA listed product, Suitable for Broken thumb, skier’s thumb, Trigger & Keeper Thumb, sprained thumb, Scaphoid fractures and chronic thumb injury protection and recovery. Besides, also suitable for all kinds of sports to protect thumb & wrist including golf, tennis , badminton, volleyball, basketball, baseball, ice hockey, skating, fishing, cricket, cycling, and martial art. Comfortable design: Spacer fabric material is latex free,3D breathable in any direction and much breathable than neoprene or PU foam. latex free is to reduce the allergy in use. You can comfortably use for all day and night time. Removable Thumb Splint :Individual thumb hole and removable splint keep thumb immobilized and protected from injury. 3D breathable in any direction. Allows performance of routine tasks in comfort, Machine washable, light weight.