The optional ScreenRoom 10x10 Rainfly will convert your Paha Que’ ScreenRoom 10x10 into a 100% waterproof shelter. Made of heavy-duty 150D Polyester with heavy-duty waterproof coating, the ScreenRoom 10x10 Rainfly is made with factory tape-sealed seams that eliminate the need for messy liquid seam-sealer.Custom designed to fit your ScreenRoom 10x10, the Rainfly easily stows away in your ScreenRoom 10x10 carry bag. The ScreenRoom roof does not have tape-sealed seams, so a rainfly is required for 100% protection from rain.The ScreenRoom 10x10 Rainfly also helps extend the life of your ScreenRoom by protecting the roof material from damaging UV rays, dirt, tree sap, and other falling items that can cause permanent damage to your ScreenRoom 10x10 roof material. Also, the additional layer of material over the ScreenRoom 10x10 roof also helps keep the interior of the shelter slightly cooler.