Classic 650S Shoe rack from Essem Design. In the late 1950s, Gunnar Bolin designed the Classic shelf. Its round shapes broke new ground and have spared many from sharp edges. The shelf has been a great seller throughout all ages. In the late 1980s and early 1990s, production peaked and over 50,000 shelves were sold each year. The shelf is made of steel and delivered unmounted.