Big Agnes Lost Dog 45 Degree Sleeping Bag

The hoodless Big Agnes Lost Dog 45 Degree sleeping bag is designed for summer or warm-weather backpacking. Its lightweight design and reliable synthetic insulation also lets it double as a liner bag in really cold conditions.

The bag’s FireLine ECO synthetic insulation dries much faster than down and provides warmth even when wet. This is particularly important if you'll be backpacking or camping in wet weather or humid climates. This sustainable insulation is also created from 100% post-consumer recycled polyester. Nylon ripstop shell fabric has a surface treatment that further helps to repel moisture and protect the insulation and a soft polyester lining provides next-to-skin comfort.

In a traditional sleeping system, the bag lies on top of a sleeping pad. In this configuration, many people find themselves rolling off the pad at night. Not only that, but the insulation on the bottom of the bag is often compressed by the sleeper's weight and, once compressed, the fill loses most of its insulating properties. The Big Agnes System is different and joins the bag and the pad together. A Flex Pad Sleeve on the bottom of the bag accommodates pads of varying lengths, widths, and thicknesses and ensures that the pad stays beneath you. It also enables the pad to deliver warmth and it allows Big Agnes to save weight and bulk by only lightly insulating the bottom of the bag itself. You'll stay warm and you can roll and move comfortably during the night without ever worrying about slipping off of your pad.

The bag is designed to be used with 20"-25" wide Big Agnes sleeping pads (sold separately) with an R-value or suggested temperature range to match the bag's temperature rating. Big Agnes does recommend using a rectangular pad for optimal performance.

The bag also features a roomy footbox, a no-draft collar, and a draft tube behind the anti-snag side zipper. There are internal loops that enable you to use a liner (sold separately) and external loops for drying or storing the bag when not in use.

Available in Regular (fits to 5'10") and Long (6' 6") size options, the Big Agnes Lost Dog 45 Degree sleeping bag includes a mesh storage sack and a polyester ripstop stuff sack.