Sea to Summit Duffle Bag

Made to go anywhere and survive anything

$119.95 – $179.95

45 liter45 liter
65 liter65 liter
90 liter90 liter
130 liter130 liter

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.


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Our range of Duffle bags is packed full of Sea to Summit's trademark innovation: clever ideas, robust materials, and quality construction. This is a super burly duffle ideal for rough and tough expeditions and over-landing adventures. It features three versatile carry options that are easy to change - backpack, classic duffle, and shoulder sling - and lash loops for attaching to expedition vehicles, touring motor cycles and animals. A double zipper provides additional security and offers further water resistance, while the extra wide opening allows for easy packing and accessing of gear.

FYI: the 45L Duffle is carry-on size


  • Padded lid opens 40% wider than conventional expedition duffles
  • A taller shape makes packing and unpacking easier
  • Magnets in carrying straps keep them perfectly positioned ready for use in classic duffle carry mode
  • Super tough burly materials used; waterproof tarpaulin laminate, base made of 1000D nylon, steel-gated hooks