"If you want to camp year-round but only want 1 sleeping bag, go for the TETON Sports Polara 3-in-1 0F Sleeping Bag with Fleece Liner. You can configure it 5 different ways for 1 person or 2 different ways for double-wide setups, allowing you to use it on warm summer nights through cold winter ones. Just add or remove layers to get the warmth you want. Smooth 100% polyester taffeta outer bag sports thermal-enhancing, double-layer construction, offset stitching, adjustable shoulder draft tubes, and full-length zipper draft tubes to prevent cold spots. Soft, anti-pilling 100% polyester PolarLite microfleece inner bag can be zipped into the outer to prevent twisting. SuperLoft Elite single-channel hollow-fiber insulation keep you comfortable on freezing nights down to 0F. Both bags unzip on 3 sides to use as comforters or to zip together as a double-wide bag. Hook-and-loop inner storage pocket on the outer bag and a zippered exterior pocket on the inner bag. Loop and toggle system makes folding and stuffing easy. This 3-in-1 sleeping bag includes a compression sack. Imported.Manufacturer model #: 1066. 100% polyester taffeta shell 100% polyester microfleece interior Insulation: SuperLoft Elite single-channel hollow fiber Can be configured 5 different ways for 1 person or 2 different ways for double-wide setups Outer bag with thermal-enhancing, double-layer construction, adjustable shoulder draft tubes, and full-length zipper draft tubes Inner bag can be zipped to outer to prevent twisting Both bags unzip on 3 sides Hook-and-loop inner storage pocket on the outer bag Zippered exterior pocket on the inner bag Loop and toggle system for easy folding and stuffing Includes compression sackSpecs: Packed: 17.5""L x 12""W x 12""H Comfort Rating: 0F Weight: 6.5 lbs."