Designed to stand alone or can be bolted down to group together (bolt to floor with optional bolt-down kit). Its ergonomic design provides maximum comfort, and its durable, 1-piece, rotationally molded design makes it stronger. Constructed of high-impact, "no break" polyethylene: no steel or wood components. Easy to clean, sanitize, and maintain. Sound-dampening polyethylene is flame-retardant (passes CAL 133), passes the UL 94 HB flammability rating, and tested to ISO 22196, showing a 99% reduction in bacteria. Manufactured to ISO-quality standards. Test reports available upon request.