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Big Agnes
Lost Dog Sleeping Bag: 45F Synthetic

4 out of 5 stars
4 Reviews

Out of Stock

Don't worry though, we have a lot more Synthetic Sleeping Bags in stock than that.

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Why We Like The Lost Dog Sleeping Bag

It's much easier for us to say yes to that next backpacking trip when we have the 45-degree Lost Dog Sleeping Bag from Big Agnes in our pack. The synthetic fill keeps the Lost Dog light and easy to pack while also warding off water in late May storms.

When it's time to call it a night you'll forget you're even in the backcountry—the Free Range footbox and Free Range hood give you room to wiggle while the pad retainer keeps your bed in one piece. With all that comfort, you'll wake up rested and ready for another day on the trail, the lake, or of simple relaxing at the campground.


  • Summertime sleeping bag for backpacking or weekend camping
  • Full-length zipper cools you down in hot summer temps
  • Free-range footbox allows your toes to move through the night
  • Mates with other Big Agnes full-zip sleeping bags
  • Ripstop material protects bag for nights under the stars
  • Semi-rectangular style gives a roomy bed-like feel
  • Item #BAG00EZ
[face fabric] nylon ripstop, [lining] polyester
FireLine ECO synthetic
full-length YKK anti-snag
Max User Height
[regular] 5ft 10in, [long] 6ft 6in
Shoulder Circumference
[regular] 69in, [long] 72in
Hip Circumference
[regular] 60in, [long] 63in
Foot Circumference
[regular] 49in, [long] 52in
Bag Length
[regular] 5ft 10in, [long] 6ft 6in
Draft Tube
no-draft collar, no-draft zipper, no-draft wedge
Pad Retainer
[regular] 20in-25in x 72in, [long] 20in-25in x 78in
Fill Weight
[regular] 11oz, [long] 13oz
Storage Sack
Stuff Sack
Stuff Size
[regular] 6.5in x 5.5in, [long] 6.5in x 6.5in
Claimed Weight
[regular] 1lb 7oz, [long] 1lb 10oz
backpacking, weekend camping
Manufacturer Warranty