This rainfly adds protection from wet or windy weather to our REI Screen House sold separately. Waterproof material keeps the weather at bay when the rain starts to fall taped seams increase weather resistance. Adjustable awning can be rolled up out of the way, acts as a windbreak when cinched down or can be guyed out to create a large covered area. VELCRO brand closure pole wraps secure the rainfly to the Screen House. Grommet attachments secure the awning in place adjustable 3-hole tensioners allow you to tighten down the rainfly. Comes with guylines, three steel stakes and a 7 x 15 inch stuff sack.