Suitable for professionals, serious students and beginners of all ages. - A great teaching and learning aid. - Elasticized for comfort and flexibility. - Reduces the weight of the clarinet on the right hand thumb. - Relieves thumb and arm aches and pains. - Enables all players to play longer without fatigue. - Reduces common technical problems for beginners by easing tension in the fingers, wrists and arms. Especially useful for children with small hands. - Fully adjustable for personal comfort. - Fits both A and Bb clarinets. - Easily fitted and removed.