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Marmot Phase 20 - Women's Review

This model will keep you warm and cozy at night, but comes with a hefty price tag.
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Price:  $479 List | $478.95 at Backcountry
Compare prices at 2 resellers
Pros:  Warmth-to-weight ratio, packs down small
Cons:  Expensive, restrictive in the leg area
Manufacturer:   Marmot
By Jessica Haist ⋅ Review Editor  ⋅  Oct 9, 2018
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85
OVERALL
SCORE


RANKED
#4 of 15
  • Warmth - 25% 9
  • Weight - 25% 9
  • Comfort - 20% 8
  • Packed Size - 15% 8
  • Features - 15% 8

Our Verdict

One of our testers called this bag her "Mermaid Bag" because she felt like one in this bright ocean blue bag with a tapered foot box that resembles a tail. We think the Marmot Phase 20 - Women's is a high-quality product that we enjoy having in the backcountry with us. It is lightweight and scores right up there with the top contenders in this category. It is surprisingly lofty and warm with 850 fill down, but also comes with a high price tag and a tight tapered ankle.

While this bag has no major drawbacks, we found some other models to perform at the same level (or a smidge higher) for less cost. For example, the Feathered Friends Egret costs a bit less but performs a bit better, and should be on your short list if you're considering dropping dough on a top-of-the-line backpacking sleeping bag with female-specific features.


Compare to Similar Products

 
Awards  Editors' Choice Award  Best Buy Award  
Price $478.95 at Backcountry
Compare at 2 sellers
$414.00 at Feathered Friends$528.95 at Amazon
Compare at 3 sellers
$329.95 at Amazon$299.96 at Backcountry
Compare at 2 sellers
Overall Score Sort Icon
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Star Rating
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Pros Warmth-to-weight ratio, packs down smallHigh-quality down, warm, lightweightHigh-quality down, warm and lofty, light, a top tier productComfortable, lightweight, excellent materials, not constrictingLightweight, compressible, comfortable
Cons Expensive, restrictive in the leg areaSizing not for everyone, fabric is a bit noisyVery expensiveComforter sometimes does not stay tucked inExpensive, not particularly warm
Bottom Line This model will keep you warm and cozy at night, but comes with a hefty price tag.This high-end bag will keep you warm and comfortable from Spring to Fall in all conditions.The Flame is a new, high-quality backpacking sleeping bag at a high price.A great, high-quality choice at a relatively low price for those looking for a lightweight bag that doesn't sacrifice comfort.This lightweight sleeping bag is a great choice for alpine climbing or fast and light adventures.
Rating Categories Marmot Phase 20 - Women's Egret UL 20 Sea to Summit Flame 15 Cloud 800 Rab Neutrino 400 - Women's
Warmth (25%)
10
0
9
10
0
10
10
0
9
10
0
7
10
0
7
Weight (25%)
10
0
9
10
0
10
10
0
9
10
0
10
10
0
10
Comfort (20%)
10
0
8
10
0
9
10
0
9
10
0
9
10
0
8
Packed Size (15%)
10
0
8
10
0
8
10
0
9
10
0
9
10
0
9
Features (15%)
10
0
8
10
0
8
10
0
8
10
0
8
10
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7
Specs Marmot Phase 20 -... Egret UL 20 Sea to Summit... Cloud 800 Rab Neutrino 400 -...
EN Comfort Rating (F) 21.7 20 (not EN rated) 15 26 21
Fill Type Goose down Goose down Duck Down PFC-Free DriDown Ethically sourced European Goose down
Total Weight (lb.) 1.75 lb 1.72 lb 1.95 lb 1.7 lb 1.7 lb
Total Weight (oz) 28 oz 27.5 oz 31.2 oz 27.4 oz 27.2 oz
Women specific features More insulation in key areas Extra fill in footbox and chest Women's specific fit - more insulation in key areas More insulation per square inch than men's version Women's specific fit
Fill Power 850 950+ 850+ 800 800
Fill Weight (oz) 18.3 oz 17.3 oz (medium) 22.9 oz 14.8 oz 14.1oz
Material 10D Pertex nylon ripstop Pertex Endurance UL Ultralight 10D Nylon Shell 15d nylon risptop Pertex Quantum
Neck Baffle Yes Yes Yes No Yes
Pocket Yes No No No Yes
Sleeping Pad Sleeve No No No Yes No
Zipper Length 54" 62" 56" N/A 62"
Shoulder Girth 60 in 54 in 60 in 59 in 60 in
Hip Girth 58 in 56 in 58 in 58 in 56 in
Foot Girth 36 in 38 in 40 in 39 in 38 in
Stuff Sack included? Stuff sack and storage bag included Stuff sack and storage bag included Stuff sack and storage bag included Stuff sack and storage bag included Stuff sack and storage bag included

Our Analysis and Test Results

We love the warmth and weight of this pretty sleeping bag, but don't like the price tag and restrictive fit around our ankles!

Performance Comparison


The Marmot Phase 20 served us well on many alpine overnights and backpacking trips.
The Marmot Phase 20 served us well on many alpine overnights and backpacking trips.

Warmth


The Marmot Phase is warm. With a fill power of 850, it has the loft and fluff you're likely seeking. The Phase offers a high level of quality down. Not only that, but the 18.3 ounces of it down fluffs up the inside of the bag, making it very warm. The Phase is almost too warm on mid-summer nights and we think it's EN rating of 21.7 is pretty accurate. If you live in warmer climates or are a fair weather camper, you could consider getting something that isn't quite as warm.

The Marmot Phase is cozy and warm.
The Marmot Phase is cozy and warm.

Weight


For having so much down fill, the Phase is just a hair heavier than other lightweight competitors. While it is still lightweight enough to bring along on all fast and light backpacking adventures, it's not the lightest option out there.

Comfort


We really love the Phase's soft liner materials that are fashioned in an attractive turquoise blue. One tester calls it her "Mermaid Bag" because of the color. She also called it that because of the strange, tapered foot box that almost looked like a mermaid tail.

The Phase's foot box is articulated at the toes and tapers at the ankle  which some might find claustrophobic for their legs.
The Phase's foot box is articulated at the toes and tapers at the ankle, which some might find claustrophobic for their legs.

If you are someone who doesn't like their legs to feel restricted, this bag is not for you. The foot box is articulated so you can have your ankles flex in it. However, it tapers down at the ankles leaving your legs feeling somewhat restricted. Another comfort feature we appreciate is the very large hood. If you cinch it down tight, it can essentially cover your whole face, wrapping you up in a cozy hug.

The Marmot Phase is very comfortable with soft liner materials. We enjoy sleeping in this bag.
The Marmot Phase is very comfortable with soft liner materials. We enjoy sleeping in this bag.

Packed Size


The Phase comes with a small-ish sized stuff sack to pack it down. It is much more compressible than its sack suggests, though, and if you purchase a separate compression sack, you can get it down much smaller. It'll fit nicely into a backpacking backpack.

Features


We like the Phase's simple features and the attempts Marmot has made at saving weight. It has a small inner pocket which we prefer for storing small things like earplugs and headlamps. The finish on the exterior of the bag is water resistant, holding up to moisture-laden mornings.

The Phase did a good job of beading moisture off when it got dewy outside.
The Phase did a good job of beading moisture off when it got dewy outside.

The troublesome feature on this bag which many people have complained about is its small-toothed zipper. It tends to catch on the shell material of the bag, requiring a lot of attention when zipping it up. Many products in this review now come with anti-snag zipper pulls to solve this problem. The other problem with this zipper is that it will not be compatible with other bags should you ever want to zip together with someone else!

One set-back with this bag is its zipper. It has a tendency to catch on the shell material.
One set-back with this bag is its zipper. It has a tendency to catch on the shell material.

Best Application


This is a great choice for all your lightweight backpacking needs. With the Phase, you can push your adventures into the shoulder season and camp from cool spring nights all the way through to crisp fall ones as well. It is not the best choice for very warm climates at the height of summer, but great for the mountains.

The Marmot Phase and the Feathered Friends Egret are both great options for long backpacking trips.
The Marmot Phase and the Feathered Friends Egret are both great options for long backpacking trips.

Value


This area is the Phase's main downfall. It is quite an expensive bag, retailing for $479. Many other high-quality bags in this review perform on par with the Phase and cost the same or less. As a result, the value isn't good.

Conclusion


If you want to feel like a Mermaid, and carry around a warm, lightweight bag on your back, the Phase could be the one for you. It has high-quality materials and will keep you warm through the seasons. Its shape is slightly restrictive around your legs, the zipper catches on occasion, and it has a steep price tag, but if you can overlook those facts, it gets everything else right.

We like the Phase's colors and feel like a mermaid in it sometimes.
We like the Phase's colors and feel like a mermaid in it sometimes.


Jessica Haist