Marmot Phase 20 Down Sleeping Bag

-7.5°C Comfort Limit (EN13537:2012), 400g of 850 Fill Power Down (US Method)
Weighs 662g (Regular bag)
Code: SS17605V
  • Now £429.99
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The Marmot Phase 20 is an ultralight mummy style sleeping bag featuring 850+ fill power hydrophobic down, a full length zipper, lots of loft helped by the Pertex Quantum GL shell fabric plus a well designed and very effective hood.

Marmot says:

Enjoy easy sleep when backpacking in frosty temperatures. The Marmot Phase 20 sleeping bag's ultralight fabric and water-resistant down and baffled construction make it the ultimate dream factory.

The Marmot Phase 20 is an ultralight mummy style sleeping bag featuring 850+ fill power down (RDS certified and treated with PFC free Down Defender to improve water resistance), a full length zipper, a well designed, effective hood and lots of loft helped by the Pertex Quantum GL shell fabric.

If you are looking for a seriously light 3 season down sleeping bag with a small pack size then the Marmot Phase 30 certainly tick the boxes. Marmot's use of ripstop Pertex Quantum GL fabric, which is one of the lightest available, allows the down to loft with ease whilst helping the bag to compress to a tiny pack size of under 6.5 litres with it's included stuff sack. With a compression bag you'd get it even smaller which is amazing for a bag rated to this temperature.

The Phase sleeping bags don't have neck baffles but they do have one of the best designed hoods we've tried which really helps to keep you felling toasty on a cold night.

The Phase 20 uses Marmot's hydrophobic Down Defender to help the down to stay dry for longer, loft better when damp and dry faster than standard untreated down.

- Reviewed by Ultralight Outdoor Gear

Help and advice:Choosing a sleeping bag adviceEN 13537 rating for sleeping bags explainedAll about down filling in sleeping bags
Sleeping bag shape and sizes adviceSleeping Bag features Page 1Sleepin bag features page 2
  • Smooth, curved baffles reduce down shifting and cold spots; multi-baffle hood limits heat loss
  • Anatomical, wraparound footbox increases insulation and room for your feet, creating more warmth and comfort
  • Full-length, locking YKK 2-way zipper with anti-snag slider is backed by a snagless insulated draft tube
  • Internal stash pocket
  • EN tested
  • Certified 850 fill power down with down defender to improve water-resistance in wet conditions
  • Filled and finished in Rohnert Park, California
  • Stuff and storage sack included
  • Regular bag weighs: 662g
  • Long bag weighs: 760g
  • Regular length fits: 183cm
  • Long length fits: 198cm
  • Fill weight: 400g
  • Certified 850 fill power down with down defender
  • Left hand zip
  • EN Rating Comfort limit: 29.5°F / -1.4°C
  • EN Rating Lower comfort limit: 18.5°F / -7.5°C
  • EN Rating Extreme limit: -13.7°F / -25.4°C
Showing our 1 review for Marmot Phase 20 Down Sleeping Bag. Write a review ›
Review Summary - 4 out of 5 based on 1 rating.
May 15, 2017 | Morten Varhaug
Light but large enough!

Surprisingly roomy around the shoulders and arms. Packs to the size of a medium down jacket. The zipper works just fine in my opinion, despite criticism by some users. Works fine at minus two Celsius, minus seven seems a bit optimistic.