Designed specifically for music rooms, the angled pitch of this chair is slightly altered, making it ergonomically perfect for music students to practice good posture and provide adequate breath support. Made of hard plastic, this chair is a great choice when you need something that can stand up to the toughest environments. With a 5/8” thick solid molded thermo-set plastic seat and a steel frame, the 510 Series Chairs by USA Capitol are built like tanks and guaranteed to last. 5/8" thick posture contoured solid molded thermoset plastic with smooth molded edges and permanent color throughout thickness.