... powder-coated steel.3)The frame is strong,durable,light in weight,not easy to rust and distort, can last for ... and Sidewalls Material:1)Double layers PVC-coated polyester textile, many colors are selectable.2)Waterproof, flame retardant to DIN4102 B1 ... the width (clear span) you need, and the length, or how many people the tent contain with2. With or without side walls ...