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Pack Converter Duffle

Don't trust airlines. Protect your backpack when it's your checked bag.

$69.95 – $79.95

Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. The test produces a Lower rating (for male sleepers) and a Comfort rating (for female sleepers). Both are listed in the features table on the product page.

A unisex sleeping bag with a Lower limit of 14ºF means a man should be comfortable down to air temperatures of 14ºF. The same bag will also have a Comfort limit, in the realm of 27°F, so a woman would be comfortable down to an air temperature of 27ºF. These ratings require 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.

A variety of factors impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag, an appropriately insulating sleeping pad and a liner as a sleep system. For example - 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, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner.



The Pack Converter Duffle is made from a durable 210D ripstop Nylon and all seams are tape sealed. It's the perfect solution for protecting your backpack during airport check-in and travel, and doubles as a rain cover when backpacking or trekking. When not housing your backpack it can also be used as a regular lightweight duffle bag for every day use.


  • Two carry handles, internally reinforced plus removable shoulder strap
  • Tough, waterproof 210D RipStop Nylon
  • All seams tape sealed
  • Contoured to fit internal frame packs

Tech Specs

Product Details

Best Use
Backpack, classic duffle, pack cover or transporting your backpacking pack
210D Ripstop Nylon
Seams are taped, zippers are not waterproof
34 x 13 x 11in / 86 x 33 x 28cm
50 - 70 L / 3000 - 4300 cu in
20 oz / 502 g
36 x 14 x 12in / 91 x 35 x 30cm
75 - 100 L / 4500 - 6100 cu in
22 oz / 594 g


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