Pluton UL 40˚

Minimalist down fill ultralight mummy bags

You've got ultralight adventuring down to a science, right? Your pack and 90% of its contents is totally dialed in for fast and light on-trail travel in warm temps, but one thing is weighing you down. Even in those warm summer months, as soon as you get up high or down low near water, that chilly quilt or bulky old bag you've been using since high school is not cutting it. The Pluton UL is a highly compressible sleeping bag with a cozy lining of incredibly lightweight and packable 850-fill DownTek™ insulation. It will keep you warm and keep your pack light, whether that's a backpack, bikepack or packraft. 
$262.46 to $277.46 $349.95
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.

Specs + Sizing

Bag WeightREG: 1lb / 454g / LONG: 1lb 3oz / 539g
Fill WeightREG: 8oz / 227g / LONG: 10oz / 283g
Compressed Bag SizeREG: 4" x 5" / 10 x 13cm / LONG: 4.5" x 5" / 11 x 13cm
Stuff Sack SizeREG: XXS 6" x 10" / XXS 15 x 27cm / LONG: XXS 6" x 10" / XXS 15 x 27cm


Crazylight minimalist mummy bag for your fast and light adventures

Highly compressible with water resistant 850 fill DownTek™

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

Minimalist hood with drawcord

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

Full-length zipper can be opened up for quilt use and provides easy temperature regulation

70" / 178cm YKK #3 locking zipper

Ergonomic footbox construction provides more loft and warmth

Two-way zipper

Zipper Garage 

Streamlined exterior loops for hang drying or storage

Mesh storage sack & nylon rip-stop stuff sack

Construction + Materials

Nylon ripstop shell fabric with a water-repellent finish

Nylon ripstop lining fabric with a water-repellent finish

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

Here’s what other people think.

What’s in a Name?

In geology, a pluton is a body of intrusive igneous rock that is crystallized from magma slowly cooling below the surface of the Earth. The Mount Ethel pluton was extensively researched in the early geological discovery days of North Routt County.