The Racatac Kneeling Roller w/ 3″ Caster & Chest Support is fully adjustable and made with a comfortable dual-density foam. Easily accessible with attachable parts that connect and disconnect in seconds. The seat and chest support can both adjust at different angles and heights, and slide back and forth. This allows both of the user’s hands to be free to work in any position, while your back and knees are on supports.