Lost Dog 45˚

Lightweight synthetic fill Big Agnes System bags designed to excel in all conditions

Big Agnes System bags with FireLine™ ECO synthetic insulation offer a roomy, rectangle-shaped sleeping space with an integrated Flex Pad Sleeve on the bottom. With technical fabrics and construction, 100% recycled, super-warm insulation, and tons of comfort features, these comfortable sleeping bags are designed to be lightweight enough for backpacking but cozy enough you'll want them in the campground too. The streamlined silhouette and Flow™ construction increase the thermal efficiency keeping you warm from head to toe. The Flex Pad Sleeve unites easily with your pad, and as you change positions over the course of the night, will keep you from rolling off your pad.
$159.95 to $169.95
100% Guarantee

100% GUARANTEE:

Our top priority is to provide customer service as stellar as the award-winning products we create. If one of our products does not perform to your satisfaction, contact our customer service team and we will help you find gear that fits your needs.
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Lost Dog Series

Specs + Sizing

Bag WeightRegular: 1lb 12oz / 794g / Long: 1lb 15oz / 879g
Fill WeightRegular: 10oz / 283g / Long: 12oz / 340g
Compressed Bag SizeRegular: 6.5" x 5.5" / 17 x 14cm / Long: 6.5" x 6.5" / 17 x 17cm
Stuff Sack SizeRegular: S 7.5" x 15" / S 19 x 38 cm / Long: S 7.5" x 15" / S 19 x 38cm

Features

The Big Agnes System bags offer technical, roomy sleeping spaces for those who aren't willing to sacrifice comfort or packability  

Streamlined silhouette for increased thermal efficiency 

Flex Pad Sleeve features stretch construction that accommodates multiple pad widths, and easily connects your bag to your pad  

Regular and Long bags fit 20" - 25" wide pads, Wide Long bags fit 25" - 30" wide pads

Pillow Barn – keeps your pillow tucked in tight all night

Non-hooded design is ideal for summer camping or use as an overbag

Construction + Materials

Nylon ripstop shell fabric with a water repellent finish

Soft, cozy polyester lining

Quilted construction 

FireLine™ ECO Synthetic Insulation - 100% post-consumer recycled polyester. Features low denier fibers that are tightly woven and provide high loft, compressibility, high weight-to-warmth ratio and durability

Imported

Here’s what other people think.

What’s in a Name?

Lost Dog Creek was named after Steamboat Springs settler John Crawford's hunting dog who went missing in the area while he was hunting bear on a tributary of the Elk River. Lost Creek meanders north of the Seedhouse Campground and Guard Station in North Routt County.