Katherine 20°

Our most compressible synthetic fill Women's bags, inspired by the Continental Divide Trail

3,000 miles; they’re gonna need some help.

A portion of the proceeds from the 1101 Collection will benefit the Continental Divide Trail Coalition whose mission it is “to complete, promote and protect the CDT from Canada to Mexico”.

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Downlike warmth and compressibility.

When an insulation loses loft, it loses warmth - an issue you won't have with PrimaLoft® Black Insulation Hi-loft Ultra in your 1101 Collection sleeping bag. With a unique, accordion-like construction this synthetic fill provides unending, resilient loft and retains your body heat's warmth even after sustained and repeated compression. PrimaLoft® Hi-loft Ultra fibers deliver uncompromised softness for camp comfort and packability for space savings.

Specs + Sizing

Bag WeightPet: 3 lbs / 1.36kg / Reg: 3 lbs 8oz / 1.59kg
Fill WeightPet: 37oz / 1.05kg / Reg: 39oz / 1.11kg
Compressed Bag SizePet: 8in x 9in / 20 x 23cm / Reg: 9inx10in / n/a
Stuff Sack SizePet: 9in x 20in / 23 x 51cm / Reg: 9in x 20in / 23 x 51cm


Traditional mummy shape allows for lightweight and increased thermal value 

Minimal exterior stitching for a sleek water-resistant exterior

Body mapped insulation delivers optimal warmth, comfort and compressibility

Oversized interior anti draft collar 

Low profile cordlock lets you un-cinch the hood with one hand

No-draft tube prevents heat loss along the zipper

Interior fabric loops for sleeping bag liners

Exterior loops for hang drying or storage

Mesh storage sack & nylon stuff sack included

Construction + Materials

Cutting edge proprietary construction created specifically for PrimaLoft® Black Insulation Hi-Loft Ultra to maintain the insulation’s vertical loft while keeping heat trapped against your body

PrimaLoft® Black Insulation Hi-Loft Ultra, 80% Recycled – introduced by Big Agnes as part of an exclusive partnership with PrimaLoft®

Nylon shell fabric with a water repellant finish

Breathable nylon taffeta lining

Layered offset quilting

YKK #5 Anti snag locking zipper - 70"/178 cm regular, 60"/153cm petite

Vaulted footbox construction provides additional loft and warmth 

Here’s what other people think.

What’s in a Name?

Lake Katherine has become one of the most popular lakes to access from the eastern side of the Mount Zirkel Wilderness. Like many lakes in the Zirkel Wilderness, it very large and seemingly very deep. The greenish glacial color of the water near shore gives way to a deep marine blue in the center, hinting at great, cold depths (and large trout, we're sure).