Provide optimal comfort to students in classrooms or training rooms with these ergonomic plastic stack chairs. The ergonomic seat shell with waterfall edge reduces leg pressure and the air-vented lower back promotes comfort. Lightweight and easy to move, these chairs are ideal for high traffic environments and outdoor use. Stack up to 20 chairs neatly after events and easily transport them with the steel stack chair dolly. Made of durable plastic/acrylic seat material and metal frame, weighing only 12lbs. The premier choice for schools and classrooms. A must-have multipurpose product.