Sleeping Bags

What Our Active Pass Members Are Testing Now: Mountain Hardwear Bishop Pass 15°F

This sleeping bag shows promise, but our tester's experience left him a little cold.

Lock Icon

Become a member to unlock this story and receive other great perks.

Already have an Outside Account? Sign in

Outside+ Logo

All Access
15% off New Year Sale
$7.02 / month*

  • A $500 value with everything in the Print + Digital Plan plus 25+ benefits including:
  • Member-only content from every title in the Outside network like Outside, SKI, Climbing, and more
  • Annual gear guides for backpacking, camping, skiing , climbing, and more
  • Gaia GPS Premium with hundreds of maps and global trail recommendations, a $39.99 value
  • Premium access to Outside TV and 1,000+ hours of exclusive shows
  • Exclusive discounts on gear, travel, and race-entry fees
  • Annual subscription to Outside magazine
Join Outside+
Backpacker

Print + Digital
50% Off New Year Sale
$2.00 / month*

  • Annual subscription to Backpacker magazine
  • Access to all member-exclusive content and gear reviews on Backpacker.com
  • Ad-free access to Backpacker.com
Join Backpacker

*Outside memberships are billed annually. Print subscriptions available to U.S. residents only. You may cancel your membership at anytime, but no refunds will be issued for payments already made. Upon cancellation, you will have access to your membership through the end of your paid year. More Details

Gear testing for Backpacker is a privilege, but that doesn’t always mean it’s Type One fun. It’s been cold and snowy in Colorado lately, and last weekend I headed out to test a prototype Mountain Hardwear sleeping bag, called the Bishop Pass 15°F, at roughly 11,200 feet near Berthoud Pass. 

My first thoughts were to give kudos to the designers for quality construction. The bag’s soft polyester interior gives it a luxurious feel, it weighs just over three pounds, and it stuffs down to a bit smaller than a football. Plus the bag’s outer material, Gore-Tex Infinium, is a performance-oriented fabric that’s windproof and highly water-resistant. Its tapered mummy shape helps shave weight, but it still accommodated my 5’11” frame comfortably (if perhaps a little tight around the torso for larger-framed sleepers). At first sight, the Bishop Pass looked like a winner.

When it came time to test the bag’s warmth, the Bishop Pass underperformed. With temps inside my tent hovering around  26°F, I found myself waking up cold throughout the night. The Exped down pad I was sleeping on is plenty warm (although I might test on a foam pad to see if the results differ), but my body couldn’t seem to conserve heat. Nevertheless, my next testing cycle should come up soon, so hopefully the bag performs better next time. And I know that this is a prototype, so perhaps Mountain Hardwear’s designers are buffing the issue out as I write this.

– Uwe Satori, Active Pass Member