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Trek Series Trek Series $188.30 – $258.30

Latitude Series

Unmatched versatility, unbeatable comfort

$251.30 – $314.30

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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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The Latitude™ down sleeping bag is an excellent versatile option designed with a tapered rectangular shape that suits a broad range of temperatures and activities. It's filled with 750+ loft RDS certified ULTRADRY Down™ and features a large hood, broad shoulders, large chest area and wider foot box offering a luxuriously comfortable backcountry bed. With the addition of a full-length side zipper and foot zipper, this bag can be opened out to a camping blanket or camping quilt. When the mercury drops, the neck collar and draft tube will help retain the warmth of the bag and the 2D NanoShell™ outer fabric will help mitigate moisture. The Latitude could be your perfect sleep refuge for traveling, hiking, cycle touring, ski touring, snow camping and more, depending on your selection of LtI (25F), LtII (15F) or LtIII (1F).


Packed Size Comparison

25°F: 6.1 L ≈ Two halves of a rolled yoga mat side by side
15°F: 7.7 L ≈ 6 pack of toilet paper. Un-quilted.
1°F: 9.6 L ≈ 6 pack of toilet paper. Un-quilted.


25°F: 1 lb 15 oz ≈ Lighter than two paper towel rolls
15°F: 2 lbs 6 oz ≈ A quart of cookie dough ice cream
1°F: 2 lbs 13 oz ≈ A wide-mouth water bottle filled with champagne


25°F: 3 Season - take this bag out spring into fall, no matter where you are.
15°F: 3.5 Season - comfort for fall, some winter, and all of spring. Perfect for summer when used as a quilt.

1°F: 4 Season - take this bag out in fall through spring conditions, perfect for summer using just as a quilt.


Roomy, lots of room to roll, curl and adjust all night long.


  • 2D NanoShell which gives this bag a high degree of breathability along with a high level of water repellency
  • RDS certified ULTRA-DRY Down 750+ Loft 90% Down Cluster Premium Duck Down
  • Full-length YKK® #5 side and foot zip
  • Will zip to any Women's Trek, Latitude™ or Talus sleeping bag to form a snug double sleeping bag
  • Oversized neck-collar, hood seal, and oversized zipper draft tube
  • Internal cell phone pocket
  • Includes lightweight Ultra-Sil compression bag and a combined storage cell/laundry bag