Product description

WE INVENT GEAR THAT ENABLES FREEDOM AND SELF-RELIANCE IN ANY ENVIRONMENT

Camp Kitchen

Ultra-portable camp kitchen gear includes lightweight and collapsible cookware, dinnerware, utensils and more.

Sleep Systems

Sleeping pads, bags, liners, and pillows . . . when you're weighing your options, the most important factor is the value of a great night's sleep.

Dry Storage

Space-saving stuff sacks and dry bags keep your camping gear dry and protected. Stay organized, easily access what you need, and keep on trekking.

Travel & Organization

Our collection of travel and outdoor accessories features a wide range of must-haves for organized, adventures.

Sea to Summit

Reactor Sleeping Bag Liner

Thermal boost liner retains heat, adds warmth to your sleep system in colder conditions, and acts as a hygienic layer to extend the life of your sleeping bag.

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Customer Reviews	34	59	56	13	31	11	3
Price	$52.46	$54.95	—	—	$179.00	$124.00	—
Best for	Camping	Camping	Backpacking and Camping	Backpacking and Camping	Backpacking	2-Season Camping	2-Season Backpacking
Dimensions	85 x 31 inches	—	72 x 25 x 4 inches	72"L x 21.5"W x 2.5"Th	72 x 22 x 2 inches	90.90 x 31.90 inches	83.1 x 32.5 inches
Weight	10 oz (284 g)	—	1.4 pounds	1.4 pounds	1.33 pounds	4.72 pounds	1 lb 7.7 oz (672 g)
R-value or Temperature Grade	Adds up to 25F of warmth	—	3.2	3.7	3.0	15°F (-9°C)	15°F (-9°C)
Non-PFAS

About the Sea to Summit Reactor Sleeping Bag Liner

Sea to Summit Reactor series insulated sleeping bag liners can extend the comfort range and improve personal hygiene of any sleeping bag. Thermolite hollow core fibers are constructed like the fur of a polar bear, efficiently trapping heat and providing a luxuriously soft, comfortable feel. The stretch-knit fabric provides optimal comfort, and ensures the Reactor fits any sleeping bag. Additionally, the drawcord footbox offers plenty of ventilation and the versatility of walking around camp while still wearing your liner. Available in three different weights, Reactor technical liners make your existing sleeping bag warmer and more versatile. The Regular Liner uses hollow-core Thermolite Pro fabric with infra red-absorbing ceramic pigments and Thermolite EcoMade fibers. This lightweight fabric adds up to 14F of warmth to your sleep system. The Extreme Liner features a thicker hollow-core Thermolite Pro fabric to add up to 25F of warmth to your sleep system. The Fleece Liner employs hollow-core Thermolite Pro fibers in a grid-pattern to deliver our warmest sleeping bag liner which adds up to 32F of warmth to your sleep system.