+4°C

Big Agnes Pluton UL 40 Down Sleeping Bag

4°C Comfort Limit, 227g of 850 Fill Power DownTek (US Method)
Weighs 466g (Regular bag)
Code: SS19351V
  • £299.99
  • (FREE UK & EU Delivery)
+ In Stock Now | Usually dispatched within 24 hours
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Big Agnes's Pluton UL is a great ultralight bag, the amount of down in it is high compared to the total weight of the bag and with a 4C recommended temperature range it compares very well with other bags in this category. It also has full length zip, shaped footbox and hood.

Big Agnes says:

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.

Big Agnes' Pluton UL 40 Down Sleeping Bag is a very light sleeping bag with a Big Agnes temperature rating of 4C, this is not an EN Tested rating but by comparing the amount of down and the quality of down in the bag we can verify that its a realistic figure roughly equivalent to the EN Comfort Limit.

At less than 500grams this bag is at the high performing end, perhaps not our lightest at this insulation level but its up there with the best, and the price point compares well.

It has everything you would want for this category of bag, virtually a full length zip with 2 way sliders, a shaped footbox and down filled hood. The hood lacks sophistication but that is probably what you would expect for this category of bag.

- 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
  • Crazylight minimalist mummy bag for your fast and light adventures
  • Highly compressible with water resistant 850 fill DownTek™
  • DownTek™ water-repellent down repels water while maintaining insulating value
  • 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
  • Anti-snag zipper for a smooth, quick zip
  • 70" / 178cm YKK #3 locking zipper
  • Ergonomic footbox construction provides more loft and warmth
  • Two-way zipper
  • Zipper Garage
  • Interior fabric loops for sleeping bag liners
  • Streamlined exterior loops for hang drying or storage#
  • Mesh storage sack & nylon rip-stop stuff sack
 RegularLong
Weight466g522g
Fill850 DownTek850 DownTek
Fill weight227g / 8oz283g / 10oz
Stuff sack size15 x 27cm15 x 27cm
Compressed bag size13x 15cm14 x 15cm
Length183cm198cm
Shoulder Girth
150cm158cm
Hip Girth
135cm142cm
Foot Girth
91cm99cm
Comfort Limit
4°C4°C
Pad Size Needed
Any pad size or styleAny pad size or style

Materials & Construction

  • Nylon ripstop shell fabric with a water-repellent finish
  • Nylon ripstop lining fabric with a water-repellent finish
  • 850 fill DownTek™ using bluesign® Certified PFOA and PFOS free water-repellant chemistry
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