The Ergobone trombone support from Ergobrass. The ERGObone trombone support is specially designed to be a handy medium to enable the player to keep his or her hands and upper body completely relaxed by removing the need for the body to support the weight of the trombone. Instead, the ERGObone support will transmit the weight of the horn to the chair, or to the harness the player may wear. Freeing up the upper body can also help the most important aspects of brass playing: breathing and airflow. With ERGObone, the only task remaining for the left hand is to hold the mouthpiece in the right place and angle for each situation.