Rokk Cimarron 4-Pound Conversion Mummy to Rectangular Sleeping Bag (Blue/Yellow) Shell;: 100% Polyester Liner Fabric: 100% Polyester Insulation Type: 100% Polyester Fiber Imported Side-zip convertible rectangular-to-mummy sleeping bag with removable hood and compression stuff sack Bag measures 33 by 86 inches (W x L); zips together with like bag Four pounds of 100 percent recycled EnviroTemp Fiberfill insulation Durable rip-stop polyester exterior with polyester pongee liner; offset quilt construction Rated for 20 to 40 degrees Fahrenheit