100% Duck Cloth Duck Dome airbag measures 36"L x 36"W. Best paired with patio chairs between 33" - 40"W For optimal results, pair with Duck Covers model numbers UCH363736 or ECH404036 chair covers 90-day limited warranty Fits into the low points of outdoor furniture, creating a dome-shaped surface under the cover Prevents those little lakes and debris from settling on top of your patio furniture cover Includes inflator adapter Colder air will naturally decrease the Duck Dome's pressure, remember to add air periodically Durable fabric provides protection from harmful UV rays