The combination of the ergonomic contouring of the seat and the slight bounce designed into the base give you the most comfortable outdoor chair in the world. The seat is made with polyethylene material for supreme impact strength and low maintenance. The base is made with heavy gauge stainless steel finished with an outdoor rated powder coating. Woosah is designed to give you a very slight and soothing bounce movement that everyone finds to be ultra-relaxing. Bring on the sun, sand, snow, salt, and rain…this chair can take it.