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Adaptor COOLMAX Liner

Keeps you comfortable as the temperatures rise

5.0 star rating 5 Reviews

$52.95 – $56.95

Size Guide

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.

$52.95

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Description

The Adaptor™ COOLMAX® sleeping bag liner is an excellent versatile choice that adapts to varied temperatures and humidity. The knitted COOLMAX® fabric is incredibly stretchy, super soft and luxuriously comfortable. It wicks moisture away from your skin, which helps keep you comfortable as temperatures rise and humidity increases, guaranteeing a great night’s sleep. This sleeping bag liner is ideal for use on its own in warm, humid climates, or as a liner inside your sleeping bag as you transition across seasons. A sleeping bag liner is imperative for keeping your sleeping bag clean and is easily washable. The COOLMAX® Adaptor™ liner is available in an Insect Shield® version for extra protection in buggy environments.

Learn more about which liner is right for you HERE.

Does the Adaptor Liner...?

  • Work for backpacking as a liner?  Yes! The Mummy version weighs 8.7ozs and will extend the comfortable temperature range of your sleep system significantly.
  • Need special care when being washed? No! The Adaptor can be washed in a washing machine with normal supermarket laundry ‘soap’; just avoid fabric softeners as they will reduce the wicking performance of the fabric. You can dry an Expander in a dryer, use cool or low heat.
  • Repel bed bugs (Insect Shield®-treated version)?  There is no FDA-approved test for ‘bed bugs’ (actually multiple species). Check insectshield.com for details.

How to Choose

The Adaptor is Perfect For...

  • Backpackers traversing a wide scale of temperatures and humidity
  • Travelers who would like to ensure a hygienic sleep environment
  • Campers looking to reduce the clammy feel in their sleeping bag
  • Warm-Weather campers who don’t need a full sleeping bag

Other Liner Options

Features

  • Stretchy, Coolmax® fabric is incredibly comfortable
  • Works like your favorite base layer to wick moisture from your skin
  • Easy care – no special soap is needed
  • Packs into its own Ultra-Sil stuff sack

Bonus

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

Technical Features

Coolmax® Fabric

Coolmax® Fabric is an amazing moisture-management fabric originally developed by DuPont. Coolmax® wicks moisture away from your skin, which prevents that uncomfortable feeling of clamminess in hot and humid climates. The stretch-knit fabric moves with you as you sleep, providing an unmatched level of comfort, whether you’re in a sleeping bag, a hostel or hotel, or on a friend’s couch.

Tech Specs

Product Details

Best Use
Warm Weather Backpacking & Camping
Comes With
Ultra-Sil stuff sack
Material(s)
CoolMax polyester
adaptor-coolmax-liner-mummy.svg adaptor-coolmax-liner-traveller.svg
 
MUMMY
TRAVELLER
DIMENSIONS
STUFF SACK SIZE
WEIGHT
82 in / 208 cm
6 x 4.5 in / 15 x 11.5 cm
8.7 oz / 248 g
7 ft 1 in x 36 in / 225 x 92 cm
6 x 4.5 in / 15 x 11.5 cm
11.6 oz / 328 g
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