Add warmth to your sleep system in cool or cold conditions: with our Reactor Liner. Using Thermolite® Pro fabric with infra red-absorbing ceramic pigments and Thermolite® EcoMade fibres , the new Reactor takes thermal performance to the next level.

The stretch-knit fabric provides optimal comfort, and ensures the Reactor fits any sleeping bag. Choose between the classic Mummy and the Mummy with Drawcord - the footbox opening offers plenty of ventilation and the versatility of walking around camp while still wearing your liner if needed.

Features

Thermal boost to retain heat and warmth. As the core of your sleep system the Reactor liner extends the performance of your sleeping bag in colder conditions
Thermolite® Pro technology using knitted, hollow-core fibres and infrared-absorbing ceramic pigments to reflect your body's heat back for enhanced warmth and comfort
The classic Mummy version has practical openings in the shoulders to allow the user to stretch his or her arms out
In the version with the drawcord footbox, the base or shuolder openings can be opened or closed for optimal comfort. They integrate perfectly with the Free-Flow Zip system in select Sea to Summit sleeping bags. Open the base drawcord, and you can hitch the liner up and walk round camp - perfect for bathroom breaks
HeiQ Fresh odour control technology helps keep the liner fresh even after extended use
Knitted fabric provides incredible stretch and freedom of movement - Reactor liners work perfectly with sleeping bags of any shape
Sea to Summit Guarantee is offered for the Lifetime of this product

Tech specs

BEST USE: Thermal Boost
COMES WITH: Storage Case
MATERIAL(S): Thermolite® Pro & EcoMade Polyester
SPECIAL: Bio-based HeiQ Fresh Odor Control

	COMPACT	STANDARD
DIMENSIONS	78 x 31.5 in	85 x 31.5 in
PACKED SIZE	5.9 x 2.8 x 4.3 in	5.9 x 2.8 x 4.3 in
WEIGHT	9.5oz	10oz

FAQ

Does the Reactor liner have a zipper?

No - to keep weight and packed volume down, we did not include a side zipper. Snaps at the shoulders mean a wider opening than some liners for entry and exit (and the drawcord footbox allows you to vent your feet or hitch up the liner and walk around camp)

Can the Reactor liner be machine washed?

Yes. It can be washed in a machine with normal supermarket detergent - but avoid fabric softeners which reduce wicking performance. Machine dry on a cool/low setting (no dryer sheets) or air dry

How much warmth does a Reactor add to a sleeping bag?

This depends on how well your sleeping bag retains warmth (not the same as its temperature rating), how well your pad insulates (not the same as its R-Value) and a lot of other factors. You should see a boost of several degrees Celsius / Fahrenheit if the liner is used with an appropriate sleeping bag and pad.

Reactor Sleeping Bag Liner

Q & A