Mountain Hardwear Phantom 45°

2 reviews
5-star:   0
4-star:   2
3-star:   0
2-star:   0
1-star:   0


Short Regular Long
Weight 1 lb 0 oz / 450 g 1 lb 1 oz / 480 g 1 lb 3 oz / 524 g
Fill Weight 7 oz / 198 g 7 oz / 198 g 8 oz / 227 g
Loft 3 in / 8 cm 3 in / 8 cm 3 in / 8 cm
Temperature Rating 45 F / 7 C 45 F / 7 C 45 F / 7 C
EN Comfort 41 F / 5 C 41 F / 5 C 41 F / 5 C
EN Lower Limit 32 F / 0 C 32 F / 0 C 32 F / 0 C
Fill 800 Fill-Power Down 800 Fill-Power Down 800 Fill-Power Down
Shape Mummy Mummy Mummy
Max User Height 5 ft 6 in / 168 cm 6 ft 0 in / 182 cm 6 ft 6 in / 198 cm
Shoulder Girth 58 in / 147 cm 60 in / 152 cm 62 in / 157 cm
Hip Girth 55 in / 140 cm 56 in / 142 cm 58 in / 147 cm
Foot Girth 37 in / 94 cm 38 in / 97 cm 40 in / 102 cm
Price $240.00 USD $250.00 USD $260.00 USD



Awesome bag. No complaints. This bag is awesome. It…

Rating: rated 4.5 of 5 stars
Source: bought it new
Price Paid: $178


Awesome bag. No complaints.


  • Ultralight
  • Warm
  • Well constructed

This bag is awesome. It stuffs down to a little larger than a Nalgene without compression straps, I'm sure it could go smaller with a compression sack, but it would be hard as a rock and harder to pack. At just over a pound, this thing has an awesome warmth to weight ratio.

Comfort rated to 32° for men, I found this to be accurate. I slept in boxers and a t-shirt in temperatures that dipped into the low 30's and was comfortably warm. I haven't had a chance to use the bag in warmer temperatures, which is what I actually bought it for.

Full length zipper will be nice, adds quilt ability for warm weather.

I can't think of anything bad to say about this bag.  Some loops for pad straps would be nice, but would add weight.  


Used this as my summer bag for my 2012 Appalachian…

Rating: rated 4 of 5 stars
Source: bought it new
Price Paid: $260


Used this as my summer bag for my 2012 Appalachian Trail thru-hike. Worked wonderfully, kept my warm when it needed to and cool on those 80+ degree nights in the middle of nowhere.


  • Lightweight
  • Durable

My summer bag was the Mountain Hardwear 45° Long. Imagine carrying a propane tank strapped to your back for a few months, and then all of a sudden switching it out for a golf ball. That’s how I felt rolling into Pearisburg and getting this bad boy.

It packs down tiny, weighs nothing, and was absolutely perfect for the miserable heat of the 2012 summer (which by the way, had some of the hottest temps on record for each state I went through). I don’t really have anything to compare it to as this was the only bag of its kind that I used, but man… love this thing.

The worst part about it was having to switch back to the Marmot Sawtooth in Hanover.

Where to Buy

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Manufacturer's Description

Visit Mountain Hardwear's Phantom 45° page.

Retailers' Descriptions

Here's what other sites are saying:

The Mountain Hardwear Phantom 45 is a compressible, lightweight 800-fill Q.Shield DOWN bag for backpackers, and climbers 45 F /7 C. A super-lightweight 800-fill bag ideal for gram counting backpackers and climbers. Q.Shield DOWN maintains heat and maximum loft in damp conditions. The almost translucent 10D fabric has a soft hand and is exceptionally lightweight.


The Mountain Hardwear Phantom 45 sleeping bag with Q.ShieldTM DOWN 800-fill goose down is big on warmth while modest on weight and bulkiness to fit your summer adventure needs in the mountains.


Mountain Hardwear Phantom 45 Down Sleeping BagThe Mountain Hardwear Phantom 45 Down Sleeping Bag is ideal for a peaceful night's sleep after a long day exploring the outdoors. This bag has a shell that is made from durable DWR-treated 10D lightweight filament weave, and it has a 20D Nylon Taffeta lining to wick moisture away for freshness. The Q.Shield 800 fill-down insulation is water-repellent which helps retain loft and provide exceptional warmth. The performance mummy-cut allows you to move freely, while the footbox contours to the natural position of your feet while you sleep. An insulated draft tube prevents cold drafts from seeping in through the zipper. When you go camping next time, get the cozy Mountain Hardwear Phantom 45 Down Sleeping Bag.

- SunnySports

On Sale. Free Shipping. Mountain Hardwear Phantom 45 Sleeping Bag FEATURES of the Mountain Hardwear Phantom 45 Sleeping Bag Q.Shield DOWN 800-fill has an advanced treatment applied that resists heat robbing moisture and retains maximum loft in damp conditions Performance mummy is cut snug, for maximum warmth and minimum weight Tight 5in. baffle spacing maximizes loft Lightweight two-way #3 zipper for easy entry and exit Down-filled face gasket comfortably blocks drafts at the hood opening Six-chamber hood design maintains even loft around head for consistent warmth Insulated draft tube with anti-snag panel prevents cold spots along zipper SPECIFICATIONS of the Mountain Hardwear Phantom 45 Sleeping Bag Comfort: 49deg F / 9deg C Comfort Limit: 40deg F / 4deg C Extreme: 15deg F / -9deg C Temp Rating: 45deg F / 7deg C Stuff Dimension: 6 x 10in. / 15 x 25 cm Shell: 10D Lightweight Filament Weave (100% nylon) Insulation: Q.Shield DOWN 800-fill Lining: 20D Nylon Taffeta (100% nylon) Loft: 3in. / 8 cm SPECIFICATIONS for Regular Fill Weight: 7 oz / 205 g Total Weight: 1 lb 3 oz / 535 g Inside Length: 78in. / 198 cm Shoulder Girth: 60in. / 152 cm Hip Girth: 56in. / 142 cm Foot Girth: 38in. / 97 cm SPECIFICATIONS for Long Fill Weight: 8 oz / 227 g Total Weight: 1 lb 4 oz / 572 g Inside Length: 84in. / 213 cm Shoulder Girth: 62in. / 157 cm Hip Girth: 58in. / 147 cm Foot Girth: 40in. / 102 cm

- Moosejaw