Expander Travel Liner

Protect your sleeping bag from your end of day dirt

$29.95 – $49.95

Size Guide
Navy BlueNavy Blue
Eucalyptus GreenEucalyptus Green
BerryBerry
Pacific BluePacific Blue

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.

$34.95

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Description

The Expander™ sleeping bag liner is a super soft and stretchy poly-cotton making it wonderfully stretchy and warm. It's an ideal choice for travel, backpacking and any activity or adventure where you want to keep your sleeping bag clean or add additional warmth to your sleeping bag. The built-in antimicrobial treatment keeps odors at bay and won't wash out of the liner when you throw it in the washing machine. This is the perfect travel companion if you're wanting a luxuriously comfortable sleep.

Learn more about which liner is right for you HERE

Highlights

Packed Size Comparison

Single:  Paperback book (summer reading size)
Double: Two ready-made rice packets

Weight

Mummy: 12 oz ≈ Two tubes of toothpaste
Traveller w/ Pillow Insert: 13.4 oz ≈ Lighter than a roll of paper towels
Rectangular: 11 oz ≈ Slightly less than two apples or one huge crispy apple
Long Rectangular: 12.4 oz ≈ Two tubes of toothpaste
Double: 21.9 oz ≈ 20oz cup of coffee

Comfort

Feels like your favorite t-shirt

BONUS

Easy to wash and helps to keep your down bag cleaner for longer.

Features

  • Premium stretch knit fabric that can expand twice its width
  • Anti-microbial protection keeps liner fresh, hygienic and odor-free
  • Double folded and reinforced seams
  • Extends the life of sleeping bags by keeping them clean
  • Easy care, machine washable