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Big Agnes Lost Dog 0 Sleeping Bag

MSRP: $229.95
Was: $229.95
Now: $172.46
(You save $57.49 )

Sick of shivering all night instead of sleeping soundly during spring backpacking excursions? The Big Agnes Lost Dog 0 Sleeping Bag is what you've been looking for. Filled with FireLine™ ECO Synthetic Insulation and designed with a streamlined silhouette to maximize heat regulation, this bag will keep you so warm you'll wake up thinking that global warming must have happened over night. This rectangular bag also features a Flex Pad Sleeve that stretches to allow the use of multiple pad widths and connects your pad and bag together so you can avoid waking up on the cold, hard ground. Buyer beware: with a roomy design and Free Range Hood that lets you move your head freely while zipped up tight, this bag is prone to making you hit the snooze button a few more times than normal.


  • Big Agnes system bags combine technical design while maximizing comfort
  • Streamlined silhouette optimizes heat regulation
  • Flex Pad Sleeve stretches to conform to multiple pad sizes
  • Low profile cordlock lets you un-cinch the hood with one hand
  • Regular and long bags fit 20" - 25" wide pads
  • Free range hood allows you to move your head comfortably
  • Pillow Barn - Keeps your pillow from slipping away during the night
  • Internal hood drawcord gives a secure fit when tightened
  • Free Range Footbox - gives your feet plenty of wiggle room
  • Rectangular shaped bag
  • Anti-snag zipper
  • 65” /152cm YKK #5 anti snag locking zipper - regular bags
  • 70”/165cm YKK #5 anti snag locking zipper - long bags
  • Zipper Garage
  • Mate together left and right zip bags
  • No-draft collar, No-draft wedge, No-draft zipper
  • Interior fabric loops for sleeping bag liners
  • Exterior loops for hang drying or storage
  • Mesh storage sack & polyester ripstop stuff sack 

Materials and Construction

  • Nylon ripstop shell fabric with a water repellent finish
  • Soft and comfortable polyester lining
  • Flow™ construction increases thermal efficiency
  • FireLine™ ECO Synthetic Insulation - 100% post-consumer recycled polyester


  • Temp Rating: 0° F
  • Bag Size: Regular or Long
  • Fits Up To: Regular - 5'10"; Long - 6'6" 
  • Pad Size: Regular - 20" x 66"; Long - 20" x 72"
  • Bag Weight: Regular - 4 lbs 2 oz; Long - 4 lbs 10 oz
  • Fill Weight: Regular - 46 oz; Long - 52 oz
  • Insulation: FireLine™ ECO synthetic
  • Compressed Size: Regular - 9" x 11.5"; Long - 9" x 12.5"
  • Stuff Sack Size: Regular and Long - 10" x 21"