It is made up of support board and straps can be well fixed fingers and wrist and provide useful training for your hand wrist.Specification:Item Type: Wrist SplintMaterial: Sponge MatColor: BlackSize: Left S, Left M, Left L, Right S, Right M, Right L(Optional)S: approx. 29.5 * 11cm / 11.6 * 4.3inchM: approx. 30 * 12cm / 11.8 * 4.7inchL: approx. 34 * 13cm / 13.4 * 5.1inchPackage Weight: approx. 143-300gPackage list:1 x Wrist SplintWarning:1. Please allow 1-3cm error due to manual measurement, thank you2. If you have an allergic rash on your skin after use, stop using it immediately and seek medical advice.ERGONOMIC DESIGN: Ergonomic shape of the patient's hand and wrist, Ideal for stroke hand, metacarpal breaks, sprained knuckle treatment, tendonitis, post-operative care, carpel tunnel syndrome, other wrist injuries and hand dysfunction. CHOOSE YOUR SIZE: S( Palm width less than or equal to 3.15"), M ( Palm width between 3.2" and 4"), L ( Palm width greater than or equal to 4"). MAXIMIZE PROTECTION: Provides your painful wrist with comfortable support during day and night,dereases pain and inflammation, keeping fingers, thumb, and wrist secured in a functional resting position. SAFE AND CLEAN: The breathable fabric on the exterior makes for easy cleaning; The aerated design will allow for ease of air, and breathability; This allows for more consistent wearing without issues, smells, or sweat. REMOVABLE & ADJUSTABLE Four straps can be well fixed fingers and wrist, one end of the strap with hook and loop, you can easily adjust. The wrist support brace is made of quality sponge that is breathable and skin-friendly, easy to clean.