Big Agnes Yampa 40°

1 review
5-star:   1
4-star:   0
3-star:   0
2-star:   0
1-star:   0


fall 2010 regular long
Weight 1 lb 14 oz / 850 g 2 lb 2 oz / 960 g
Fill weight 9.5 oz / 270 g 10.5 oz / 298 g
Temperature rating 40 F / 4.4 C
Fill 650 fill down
Shape rectangular
Max user height 5 ft 10 in / 180 cm 6 ft 6 in / 200 cm
Shoulder girth 70 in / 180 cm 73 in / 190 cm
Hip girth 66 in / 170 cm 69 in / 180 cm
Foot girth 54 in / 140 cm 55 in / 140 cm



I purchased this Yampa to replace a worn Marmot bag.

Rating: rated 5 of 5 stars
Price Paid: $170

I purchased this Yampa to replace a worn Marmot bag. It is extremely lightweight and durable. It has been on many trips with me, it has kept me quite comfortable down to about 32F.

What I like the most is that it is not a mummy shaped bag and affords me a lot of extra leg/body room. I purchased the long size (78"?), but I probably could have sufficed with the regular 72" length (I am 6'). It added a bit of extra weight, but well worth it.

One drawback - I owned a BA 25" down insulated sleeping pad. This size bag will only fit a BA pad up to 20". thank God I purchased from a locally owned outdoors shop (Ozark Outdoors), and they gave me a great deal with a trade in.

Overall: well worth the price and outperforms many of the bags that are easily twice the price.

Retailers' Descriptions

Here's what other sites are saying:

The Big Agnes System is different than the traditional sleeping bag on top of a sleeping pad. With Big Agnes, the pad slides into an integrated sleeve on the bottom of the bag, and the top two-thirds of the bag is insulated in the traditional style. We el

- Teton Village Sports

The Big Agnes Yampa Sleeping Bag offers comfort value and versatility in a very light weight bag. At 1lb 13oz the Yampa packs down to the size of a cantaloupe but is as comfortable and roomy as your own bed. Combine the Big Agnes Yampa with the Big Agnes Air Core pad and you'll have an ultra-light sleeping bag and pad combo. We recommend the Big Agnes Air Core Rectangular Pad with the Big Agnes Yampa Sleeping Bag.


On Sale. Free Shipping. Big Agnes Yampa 40 Degree Sleeping Bag (Fall 2010) FEATURES of the Yampa 40 Degree Sleeping Bag by Big Agnes Integrated pad sleeve. Never roll off your pad again Rectangular shape offers more room in foot box and shoulders Cotton storage sack and nylon stuff sack included Recycled mesh storage sack and nylon stuff sack included with Mystic Built in pillow pocket holds a fleece or Big Agnes pillow Interior fabric loops for sleeping bag liners 70in. YKK #8 zipper on Yampa, Fish Hawk, Lost Ranger, Storm King 70in. YKK #5 zipper on Mystic Mate together our left and right zip bags with same size zipper No-draft collar seals around neck to keep cold air from sneaking in No-draft wedge insulates the connection between the bag and pad No-draft zipper tube insulates along the length of the zipper SPECIFICATIONS: Fabric: 330T shell, 300T lining, 210T bottom Shell fabric: Down proof, nylon microfiber rip-stop. WR surface treatment to repel water Lining: Soft, breathable down proof nylon with stain resistant finish Pad sleeve: Nylon rip-stop. WR surface treatment to repel water Mystic only: Shell and Pad sleeve: Ultralight, high thread-count, rip-stop nylon with WR surface treatment to repel water. Lining: Nylon taffeta Down Insulation: High quality goose down SPECIFICATIONS for Regular: Fill Type/Fill Weight: 650 fill / 9.5 oz Bag Weight: 1 lb / 4 oz Stuff Sack Size: S: 7.5in. x 15in. Compressed size: 7in. x 5in. Pad size/shape: 20in. x 72in. / Rectangular SPECIFICATIONS for Long: Fill Type/Fill Weight: 650 fill / 10.5 oz Bag Weight: 2 lb / 2 oz Stuff Sack Size: S: 7.5in. x 15in. Compressed size: 7in. x 6in. Pad size/shape: 20in. x 78in. / Rectangular

- Moosejaw

The rectangular-shaped Big Agnes Yampa 40-Degree Down Sleeping Bag has a large 70in (regular size) shoulder girth, ideal for summer camping when you don't want a tight mummy bag. The Yampa sleeping bag is stuffed with 650-fill goose down and weighs less than two pounds (regular) thanks to its ingenious design: Only the top and sides of the bag are insulated. Under you, where insulation would be compressed and useless, is a rectangular sleeping-pad sleeve that holds your pad in place, so you'll never roll off it while you're sleeping. *Compatible with 20in-wide Big Agnes rectangular pads.


Summer adventures or travel in warm climates call for the Yampa, a comfortable down-filled sleeping bag from Big Agnes. Sleeping bag has no underside insulation; in its place, a sleeve holds the Big Agnes REM Air Core Pad or any 20 in. wide pad, sold separately. Lightweight 40° modified mummy design features 650-fill-power goose down insulation—warm, lightweight and compressible. Nylon ripstop shell with a Durable Water Repellent finish sheds water; breathable nylon lining is soft against the skin. Built-in pillow sleeve allows you to stuff a jacket or a backcountry pillow inside and keeps it in place all night long. Features a wo-way, full-length, locking zipper with big, easy-to-grab zipper pull. Fabric stiffeners along both sides of the zipper prevent zipper snags. Bag will zip to another Classic Series bag if they zip along opposite sides. Includes nylon stuff sack and cotton storage bag.


Big Agnes Yampa 40°


The Yampa 40° has been discontinued.

previously retailed for:
$95.97 - $184.95

The Big Agnes Yampa 40° is not available from the stores we monitor. It was last seen November 5, 2013 at

If you're looking for a new warm weather down sleeping bag, check out the best reviewed current models.