Updated with new color and stylingStill designed to fit our revolutionary Backcountry Bed and a 2.5" inflatable pad on the inside of the bivy, so you can sleep as comfortably on a rock ledge, as you do at home.FeaturesLarge u-shaped openingMesh window panelWaterproof/breathable top fabricFully taped seams (pvc free)Compatible with most sleeping bags, especially the Backcountry BedMaterialsTop Fabric:20D Nylon Ripstop WPB, DWR/10,400MM PeU, 18,300 g/day MVTRBottom Fabric:30D Nylon Ripstop, DWR/1200mm PeU, FR CPAI84Technical SpecificationsRegularMinimum Weight: 13oz / 0.37kgPackaged Weight: 14 oz / 0.40kgLength: 80" / 203cmShoulder Width: 36" / 91cmStorage Bag Size (L x W): 10" x 4" / 25.4cm x 10.2 cmSource: Imported Sierra Designs Backcountry Bivy Sleeping Bag - Regular