Trek II Women's

Extra warmth and space just for women

$191.40 – $203.40

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 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 while a woman would be comfortable down to the air temperature of 30ºF, the comfort limit. Men and women should always sleep in a layer of long underwear and use a sleeping mat.

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

There’s a huge variety of factors that can impact sleeping bag warmth, so these ratings are not guarantees. We always recommend choosing a bag that is a few degrees colder than you plan on going out in (choosing a 23ºF bag for 27ºF nights). If you have any questions about which temperature you should select, or how to improve your warmth in a sleep system, reach out to us on our contact page any time.


Other ways to purchase

No Online Retailers Stocking Current Selection


We've designed a down sleeping bag collection specifically for women and the Trek™ Women's Series includes two models. The women's Trek™ bags use the same 650+ loft RDS certified ULTRADRY Down™and 2D PermaShell outer fabric as the regular bags. They're cut slightly shorter and wider to incorporate extra room in the hip area, along with more down in the foot and torso areas. Additionally, we've used a layer of THERMOLITE® insulation in the foot box to keep ankles and feet toasty through the night. This versatile bag is ideal for many activities and is ready to be put to the limits during any adventure.


Packed Size Comparison

28°F: 6.0 L ≈ A large melon, but not edible
18°F: 7.0 L ≈ Two halves of a rolled yoga mat side by side


28°F: 2 lbs 3 oz ≈ A quart of cookie dough ice cream
18°F: 2 lbs 11 oz ≈ A wide mouth water bottle filled with champagne


28°F: 2.5 Season - Take this bag out late spring into early fall, no matter where you are.
18°F: 3 Season - Comfort for fall, some winter, and all of spring. Perfect for summer when used as a quilt.


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


  • RDS certified ULTRA-DRY Down 650+ Loft 85% Down Cluster Premium Duck Down
  • Women's specific cut: narrower in the shoulders, wider in the hip section.
  • Women's specific insulation: Extra down and a layer of THERMOLITE® in the bottom two baffles for extra warmth in the feet.
  • Will zip to any Basecamp™, Trek™, Latitude™, or Talus™ sleeping bag to form a snug double sleeping bag
  • Full-length YKK® #5 side and foot zip
  • Includes lightweight Ultra-Sil™ compression bag and a combined storage cell/laundry bag