Skip to content

Sleeping Bag Liners

A sleeping bag liner is your next-to-skin layer. Whether you're looking for a cotton, silk, or fleece liner, this essential layer can wick moisture, add warmth, and keep your sleeping bag clean.
View Sleeping Bag Liners Comparison Chart



Reactor LinerReactor Compact Plus LinerReactor Extreme LinerReactor Fleece Liner
Price
$62.95
$66.95
$69.95 - $74.95
$89.95
Customer Rating




Added Warmth
Up to 14°F | 8°C
Up to 20°F | 11°C
Up to 25°F | 14°C
Up to 32ºF | 18ºC
Weight8.7 oz | 248 g9.3 oz | 263 gFrom 14 oz | 399 g13.4 oz | 379 g
Length6 ft 10 in | 208 cm6 ft | 183 cmFrom 6 ft 10 in | 210 cm 6 ft 6 in | 200 cm
$69.95
$84.95-$94.95
$59.95-$62.95

Your next-to-skin sleep layerSilk, Cotton & Fleece Sleeping Bag Liners

Use one of our award-winning sleeping bag liners to boost warmth, wick moisture or simply keep your sleeping bag cleaner for longer. A sleeping bag liner can significantly raise your hygiene standards on longer trips—and stop dirt and grime from getting into the insulation of your sleeping bag and causing havoc.


A liner is a great way to protect your investment – using one on every trip will significantly cut down on the number of times you need to wash your sleeping bag. Most of our liners are easy care fabrics that can simply be machine washed.
Sleeping bag liners like our bestselling THERMOLITE Reactor Extreme are designed to add warmth to your sleep system in colder conditions. They’re a great way to extend the temperature range of your sleeping bag. Comfort is key when choosing a sleeping bag liner to complete your sleep system. 

Our sleeping bag liners come in a range of soft fabrics to suit everyone—from silk and cotton sleeping bag liners, to fleece and stretch-knit. They also come in a range of shapes, lengths, and sizes – whether you are backpacking, comfort camping or traveling, we have the perfect liner for you Choose a mummy shaped liner to save weight on lightweight hikes or opt for a double silk travel liner for questionable hostel beds. Sea to Summit liners are the hygienic, packable, comfortable next-to-skin layer that helps you sleep soundly.

Accessibility Icon This icon serves as a link to download the eSSENTIAL Accessibility assistive technology app for individuals with physical disabilities. It is featured as part of our commitment to diversity and inclusion.