What's Summit Club?
Find Your Store
Accessibility Policy
Home Page
When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
Expert Help

Cart, contains 0 items

Accessibility Policy
Home Page

Cart, contains 0 items

When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
Mountain Hardwear
5 out of 5 stars
5.0 (3)
Mountain Hardwear

Phantom Windstopper Sleeping Bag: -40F Down

5 out of 5 stars
3 Reviews
$1,559.99 - $1,589.99

Style & Size:

Add Ons



Join Summit Club+ and


Mountain Hardwear Phantom Windstopper sleeping bag holds warmth in -40°F conditions

The Phantom Windstopper -40 down sleeping bag shapes its mummy cut with extra room through the footbox, so climbers can stash boots and water bottles inside without losing warmth. Its GORE-TEX Windstopper shell blocks wind and sheds light precipitation, holding up in brutal alpine conditions. Updated 800-fill RDS down and a lighter 15D nylon ripstop lining keep the bag warm and packable at expedition weights.


What Our Gearhead® Experts Are Saying:

"I've spent five nights zipped into this bag above 17,000 feet and never woken up to a damp lining. The Windstopper membrane blocks wind without turning into a vapor barrier, so the moisture I put off overnight gets out instead of collecting on the inside of the shell."


Details

  • Windproof sleeping bag for extreme-altitude expeditions
  • 800-fill RDS-certified down insulates reliably down to -40°F
  • Draft collar and insulated zipper tubes lock in heat
  • Vertical side baffles maintain loft for lasting warmth
  • Number 5 zipper resists snags for fast entry and exit
  • Compression sack and mesh sack included for packing
  • Item #MHWZAF9
Responsible Collection
Responsibly Sourced
Material
GORE-TEX Windstopper (2-layer), [face fabric] 30D nylon ripstop, [lining] 15D nylon ripstop
Insulation
800-fill goose down (RDS-certified)
Shape
Mummy
Zipper
Left-hand, 3/4-length
Max User Height
[Regular] 6ft, [Long] 6ft 6in
Shoulder Circumference
66in
Hip Circumference
62in
Foot Circumference
50in
Bag Length
[regular] 89in, [long] 95in
Draft Tube
Yes
Pockets
None
Pad Retainer
No
Fill Weight
[Regular] 2lb 15.5oz (1348g), [Long] 3lb 1.1oz (1391g)
Degree
-40F
European Norm/ISO Comfort Rating
13F°
European Norm/ISO Lower Limit Rating
0F°
Storage Sack
Mesh storage sack included
Stuff Sack
Compression sack included
Stuff Size
[Regular] 20 x 11in
Claimed Weight
4lb 8.4oz
Activity
backpacking, mountaineering, winter camping
Manufacturer Warranty
Lifetime
A camper sets up a white Mountain Hardwear tent in a high mountain meadow with snow-capped peaks in the distance.

Seek Wilder Paths

Mountain Hardwear makes durable performance equpment that gives you the confidence to try, grow, and evolve outdoors.

Shop All Mountain Hardwear