Crosho UL -20°

Technical, ultralight down fill traditional mummy bags designed to excel in all conditions

Technical, ultralight down fill traditional mummy bags designed to excel in all conditions

You asked for an ultralight bag that could withstand the rigors of high alpine bivies, be warm enough for the most extreme environments, and also pack efficiently and weigh next to nothing. Challenge met. Welcome back, the re-designed Crosho UL -20 bag. Built with a superlight, high-tear strength shell, insulated with 850 fill power DownTek™, and body mapped, thermally efficient baffles, this bag has your back (and all other body parts) when conditions make that a necessity.
$579.95 to $619.95
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.
$579.95 to $619.95

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Specs + Sizing

Bag WeightSmall: 2lb 9oz / 1.16kg / Reg: 3lb / 1.36kg / Long: 3lb 4oz / 1.47kg
Fill WeightSmall: 33oz / 935g / Reg: 35oz / 992g / Long: 37oz / 1049g
Compressed Bag SizeSmall: 8in x 8in / 20 x 20cm / Reg: 8in x 9in / 20 x 23cm / Long: 8in x 9in / 20 x 23cm
Stuff Sack SizeSmall: 9in x 20in / 23 x 51c/ Reg: 9in x 20in / 23 x 51cm / Long: 9in x 20in/ 23 x 51cm


Shape allows for light weight and increased thermal value

3-D anti-snag draft tube prevents heat loss along the zipper

Contoured hood baffles cradle the head for a more comfortable fit

Oversized interior anti-draft collar 

DownTek™ water repellent down repels water while maintaining insulating value

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

Minimal zipper cuts weight and reduces cold spots

Two-way zipper allows easy access at waist for climbing harness tie-in

Zipper Garage 

Interior fabric loops for sleeping bag liners

Streamlined exterior loops for hang drying or storage

Mesh storage sack & nylon stuff sack

Construction + Materials

Traditional mummy shape

Nylon rip-stop shell fabric with a water repellent finish 

Nylon rip-stop lining

Insotect Flow™ construction

850 fill DownTek™ water repellent down 

Body mapped baffle construction optimizes thermal efficiency

Vertically structured sidewalls integrating contoured baffles trap heat closer to the body

Ergonomic foot box construction provides more loft and warmth 

Ultralight high tenacity shell fabric

40"/102cm YKK #5 zipper 

Here’s what other people think.

What’s in a Name?

Crosho Lake was and accidental discovery in 1882. The lake was discovered when a pair of early pioneers were looking for their lost horses while they were hunting for elk. When they became separated, one of the gentlemen reported finding a large herd of elk, while the other reported finding Crosho Lake. The horses gave them the slip permanently. Today, the area is popular for fishing and hiking on nearby trails. The Crosho Lake Recreation Area is located a few miles northwest of Yampa at the base of the Little Flat Tops. Hold onto your horses though, the area proves tempting for equines to go rouge.