Flume UL 30°

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

DownTek™ Water Repellent Down Insulation

Down sleeping bag insulation has long been the favorite of backpackers, thru-hikers, and mountaineers due to its relative light weight and ability to pack down small. While down bags generally cost more and require more care to keep dry in humid conditions, the soft feel of down is unsurpassed and extremely popular.

Specs + Sizing

Bag WeightReg: 1lb 6oz / 624g / Long: 1lb 8oz / 680g
Fill WeightReg: 12oz / 340g / Long: 14oz / 397g
Compressed Bag SizeReg: 5.5in x 7in / 14 x 18cm / Long: 5.5in x 8in / 14 x 20cm
Stuff Sack SizeReg: S 7.5in x 15in / S 19 x 38cm / Long: S 7.5in x 15in / S 19 x 38cm

Features

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™ - a water repellent down that uses a PFC-Free, bluesign™ approved chemistry.

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™ - a water repellent down that uses a PFC-Free, bluesign™ approved chemistry.

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?

Flume Gulch, located in Moffat County, was a notoriously challenging place to pan for gold. Its close proximity to the more fruitful Castor Gulch left many miners wasting their time during the height of the Colorado gold rush. They soon wisened up and abandoned the now valley in present-day Craig, CO.