Basecamp Down Series

A camping sleeping bag that doesn't feel like a coffin

$251.30 – $328.30

Size Guide
What Is This

Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. Unisex sleeping bags list the Lower Limit which is the lowest temperature rating that an average male sleeper would be comfortable in. Our women’s sleeping bags list the Comfort Limit, which is the lowest temperature rating at which an average female sleeper should be comfortable. The comfort and lower limit temperature ratings are listed in the features table on the product page.

For example, a unisex sleeping bag that shows a Lower limit of 23ºF means a man should be comfortable down to air temperatures of 23ºF. The same bag will also have a Comfort limit, in the realm of 32°F, so a woman would be comfortable down to an air temperature of 32ºF. Men and women should always sleep in a layer of long underwear and use a sleeping mat with an R-Value appropriate for expected ground temperatures – without this, the sleeping bag itself is unlikely to keep the sleeper warm enough.

Here’s a basic categorization of appropriate use, based on rated temperatures:
Summer:   >+35ºF / +3°C
3-Season:   +10 to +35ºF / -15° to 0°C
Winter:   <10ºF / -15°C

A huge variety of factors can impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag as one element in a sleep system which also includes an appropriately insulating sleeping pad and a liner. For instance - if you plan on sleeping in nighttime air temperatures of 27ºF / -3°C, choose a bag with a gender-appropriate rating of 23°F / -5°C nights, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner. If you have any questions about which temperature sleeping bag / R-Value sleeping mat you should select, or how to improve your warmth in a sleep system, reach out to us via our contact page any time.

$359.00 $251.30

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Bring the comfort of home to your next night in the outdoors with the versatile Basecamp™ down sleeping bag series. A generous rectangular cut gives ample space while its technical features allow you to bring your comfort further. Two full-length side zippers and a foot box zipper allow users to easily control temperature or fully detach the top layer to be used as a quilt or blanket on its own. The top or bottom layer may even be left at home during hot summer trips. For sleepers who move about in the night, there is an option to secure the sleeping mat to the base of the sleeping bag to keep sleepers centered on the mat. There's also a sleeve to secure a pillow in place. With RDS certified ULTRADRY Down™, you will be warm, dry, and will sleep well knowing you've made a versatile and comfortable sleeping choice.


Packed Size Comparison

33°F: 7.8 L ≈ 6 pack of toilet paper. Un-quilted.
15°F: 8.3 L ≈ 6 pack of toilet paper. Un-quilted.
5°F: 10.2 L ≈ About the size of a large bear canister


33°F: 2 lbs 5 oz ≈ A quart of cookie dough ice cream
15°F: 2 lbs 10 oz ≈ A wide-mouth water bottle filled with champagne
5°F: 3 lbs 5 oz ≈ Lighter than a standard pillow (does not include the chocolate mint)


33°F: 2.5 Season - Take this bag out late spring into early fall, no matter where you are.
15°F: 3.5 Season - Built for fall, some winter, and all of spring. Perfect for summer when used as a quilt.

5°F: 4 Season - Take this bag out in fall, winter, and spring. Perfect for summer when used as a quilt.


Generous, practically like sleeping in a regular bed.


  • RDS certified ULTRA-DRY Down 750+ Loft 90% Down Cluster Premium Duck Down
  • 2D PermaShell™ water-resistant shell fabric
  • Spacious rectangular shape
  • Pillow attachment system under the hood to hold an Aeros™ pillow in place (not included)
  • Two positions sleeping mat attachment system
  • Zip draft tube with anti-snag
  • Neck draft tube
  • Cushioned internal hood draw-cord
  • 2-way YKK® #5 zip on each side of the bag
  • Can zip to any Trek™, Talus™, Latitude™, or Micro™ (model 2017 or newer) sleeping bag
  • Includes lightweight Ultra-Sil™ compression bag, combined storage cell/laundry bag