Big Agnes Yampa 45 Down Sleeping Bag

7°C Comfort Limit, 270g of 650 Fill Power DownTek (US Method)
Weighs 782g (Regular bag)
Code: SS18470V
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The Yampa 45 is part of the classic down series of Big Agnes sleeping bags that offer warmth, compressibility and the 'Big Agnes System' which integrates the sleeping bag and sleeping mat.

Big Agnes says:

Warm weather bikepackers, backpackers, and anyone who can appreciate the ultra-compressibility of a lightweight, 650 fill DownTek™ Big Agnes System bag, unite! The Yampa offers cozy quilted construction with a lofty fill that compresses for optimum packing when a super warm bag isn't needed. Paired with a UL tent and pad, or maybe a hammock, and you've got a premium set up with maximum comfort.

The Big Agnes Yampa 45 is a lightweight down sleeping bag that's focused just as much on comfort then it is on weight.

The Downtec hydrophobic treated 650 fill power down repels water and speeds up drying time it if does get wet. The lightweight nylon ripstop fabrics are durable and soft to the touch. Vertical side walls help to trap heat closer to your body and the Tapered vaulted foot box creates wiggle room for your feet. The bag is well proportioned and quite spacious internally. This would suite people who want that extra space or those who just move around a lot in there sleep.

The stretch fabric designed to contain the sleeping mat improves the connection between bag and mat making for a great nights sleep. To use the full pad sleeve a rectangular sleeping mat is needed and the dimensions of the bag need to match. The material does stretch enough to fit a pillow in too to maximise that comfort.

- Reviewed by Ultralight Outdoor Gear

Help and advice:Choosing a sleeping bag advice
 EN 13537 rating for sleeping bags explained
 Sleeping bag shape and sizes advice
 Sleeping Bag features Page 1
 Sleepin bag features page 2
 All about down filling in sleeping bags
  • Design improves connection between pad sleeve and bag providing a roomier sleeping space without adding bulk
  • Sculpted contour allows the bag to drape around you, increasing insulation performance
  • Free Range Hood design – gives you the freedom to lift your head while snuggled in the hood
  • Non-hooded design on Yampa is ideal for summer camping or use as an over bag 
  • Low profile cordlock lets you un-cinch the hood with one hand
  • Tapered vaulted foot box creates wiggle room for your feet without creating large cold air pockets 
  • Stretch fabric panel beneath hood creates a designated pillow pocket
  • DownTek™ water repellent down repels water while maintaining insulating value
  • Integrated full pad sleeve creates a secure attachment to the bag
  • Rectangular shaped bag
  • Lightweight mini rip-stop micro fiber for high performance and a soft feel
  • 61"/155cm YKK #8 zipper
  • Zipper Garage 
  • Mate together left and right zip bags
  • Interior fabric loops for sleeping bag liners
  • Exterior loops for hang drying or storage
  • Mesh storage sack & nylon stuff sack

The Yampa 45 can be coupled with a Yampa 45 bag with a zipper on the right hand side. Contact us if you are interested in ordering a bag that will couple with the Yampa 45 Sleeping Bag.

Fill650 DownTek650 DownTek
Fill weight270g / 9.5oz326g / 11.5oz
Stuff sack size19 x 38cm19 x 38cm
Compressed bag size15 x 17cm15 x 18cm
Shoulder Girth
Hip Girth
Foot Girth
Comfort Limit
Pad Size Needed
Rectangular - 51 x 183cmRectangular - 51 x 198cm
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