Aeros Pillow Case

Case Closed

$14.95 – $17.95

Navy BlueNavy Blue

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 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. 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.


Aeros™ Pillow Cases slip over your Aeros™ Pillow and are easily removed to be machine or hand washed. They also turn pre-2019 Aeros™ Pillows into Pillow Lock™ compatible with 2019 Sleeping Mats.

And if you find yourself on a fast-and-light mission, they can be stuffed with a down jacket or other clothes to form a minimalist pillow.

Does the Aeros Down Pillow…?

  • Going to add a lot of weight to my Aeros Pillow? Not at all! High-quality fabrics and a lightweight zipper mean that the size Large still only weighs 1.5ozs / 41g.

  • Machine washable?  Yes. No special soap is necessary; the Pillow Case can be washed with the rest of your laundry. Air drying the lightweight fabric is preferable to using a dryer.

  • Available in a size large enough for the Deluxe Pillow?  No – Currently we have only a Regular, Large and Traveller size available.


  • Makes a pre-2019™ Aeros Pillow Lock™ compatible with 2019 Sleeping Mats.
  • Hidden 8” / 20cm zipper means quick and easy removal for washing