The LP Wrist and Thumb Support includes an aluminium splint for partial immobilization of the thumb, whilst allowing free movement of the fingers.The support helps to prevent carpal tunnel syndrome and supports a weak or injured wrist. The adjustable hook and loop closure ensures a comfortable fit and stabilisation during activity.The LP Wrist and Thumb Support is made from the highest grade closed cell neoprene, covered with stretch nylon on both sides for comfort. Neoprene is the ultimate material for compression and heat retention, and this support retains body heat to warm the wrist and increase blood circulation.Measure the circumference of the wrist.Small5 ½ – 6 ⅜”14 – 16.2cmMedium6 ½ – 7 ⅜ “16.5 – 18.7cmLarge7 ½ – 8 ⅜ “19 – 21.3cmX-Large8 ½ – 9 ⅜ “21.6 – 23.8cmHand wash with mild soap in cold water. Rinse thoroughly. Air dry at room temperature. Do not machine wash or dry.