Cesca's seat and back are urethane foam over molded plywood. Frame is 1” diameter chrome-plated round steel tube with a polished finish. Plastic glides protect the floor and prevent the stool from tipping forward. The KnollStudio logo and signature of Marcel Breuer are stamped into the base of the chair.Marcel Breuer married traditional craftsmanship with industrial methods and materials to help make tubular steel furniture an international sensation and a modern institution. The cantilevered form exploits the possibilities unique to the material and gives the chair added flexibility and comfort.