The new sheet bag comes in two sizes and looks great. The small bag's mouth opens up to 15cm and the large to 20 cm. Both mouths close completely due to the unique elastic design. The bags are made from UV resistant Sunbrella fabrics to stand up to the Australian environment. They feature drainage mesh, fibre reinforced battens and stainless steel eyelets. Stainless Steel Eyelets Drainage Mesh UV Resistant SUNBRELLA Fabric Wide opening