2 Free Issues and 3 Free Gifts!
Full Name:
Address 1:
Address 2:
Zip Code:
Email: (required)
If I like it and decide to continue, I'll pay just $12.00, and receive a full one-year subscription (9 issues in all), a 73% savings off the newsstand price! If for any reason I decide not to continue, I'll write "cancel" on the invoice and owe nothing.
Your subscription includes 3 FREE downloadable booklets.
Or click here to pay now and get 2 extra issues
Offer valid in US only.

Also on

Enter Zip Code

Backpacker Magazine – Fall/Winter Gear Guide 2012

Gear Review: Mammut Sphere Alpine Winter Sleeping Bag

This ultralight sleeping bag packs small but lofts quickly for a warm night.

by: Will Rochfort

Mammut Sphere Alpine Winter Sleeping Bag
Mammut Sphere Alpine Winter Sleeping Bag

If pack space and weight are your primary concerns, this is your bag. The 850-fill down lofts quickly and kept our testers warm right down to the 5°F rating when they wore a puffy jacket (a common mountaineering technique that allows you to carry a lighter bag). The Sphere has a trim, efficient cut in the legs and feet with a slightly wider torso area to accommodate those extra layers.

Mammut’s 20-denier prolightTX shell is extremely breathable, which, along with venting the 3/4-length zipper, allowed testers to stay comfortable up into the mid-40s. “The shell requires standard ultralight love and care, but it effectively repelled light drizzle and snow on Mt. Hood when we slept sans rainfly and woke to unexpected precipitation,” says one tester. However, it did wet out when pressed against a damp tent wall all night. It squishes down to the size of a small watermelon with the included compression stuffsack. Extra credit for the cozy microfleece face guard and the 14-by-14-inch mesh pocket inside the torso area, which is perfect for storing gloves, liners, or damp clothes that need drying. $550; 2 lbs. 8 oz.; reg. and long;

gear finder

Subscribe to Backpacker magazine
Sign up for our free weekly e-newsletter
Address 1:
Address 2:
Email (req):
Reader Rating: -


Your rating:
Your Name:


My Profile Join Now

Most recent threads

The Political Arena
No Fan of Obama's Stance on Immigration...
Posted On: Aug 01, 2014
Submitted By: Ben2World
Yosemite this weekend, would you go?
Posted On: Aug 01, 2014
Submitted By: ekkthree

View all Gear
Find a retailer

Special sections - Expert handbooks for key trails, techniques and gear

Check out Montana in Warren Miller's Ticket to Ride
Warren Miller athletes charge hard and reflect on Big Sky country, their love for this space and the immense energy allotted to the people who reside in Montana.

Boost Your Apps
Add powerful tools and exclusive maps to your BACKPACKER apps through our partnership with Trimble Outdoors.

Carry the Best Maps
With BACKPACKER PRO Maps, get life-list destinations and local trips on adventure-ready waterproof myTopo paper.

FREE Rocky Mountain Trip Planner
Sign up for a free Rocky Mountain National Park trip planning kit from our sister site

Follow BackpackerMag on Twitter Follow Backpacker on Facebook
Get 2 FREE Trial Issues and 3 FREE GIFTS
Survival Skills 101 • Eat Better
The Best Trails in America
YES! Please send me my FREE trial issues of Backpacker
and my 3 FREE downloadable booklets.
Full Name:
Address 1:
Zip Code:
Address 2:
Email (required):
Free trial offer valid for US subscribers only. Canadian subscriptions | International subscriptions