An essential component in your sleep system, the Reactor Extreme liner with Thermolite® Pro fabric utilises innovative infra red-absorbing ceramic pigments to give your system the thermal boost needed in colder-weather adventures.

The soft, wicking stretch-knit fabric provides unmatched comfort and freedom of movement while still allowing the Reactor Extreme liner to fit any sleeping bag. Additionally, the drawcord footbox 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 and sleeping mat in the coldest of 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
Drawcord footbox and shoulder openings can be opened or closed for optimal comfort and integrates perfectly with the footbox of our Free-Flow Zip system in select Sea to Summit sleeping bags
HeiQ Fresh odour control technology helps keep the liner fresh even after extended use
Knitted fabric provides incredible stretch and freedom of movement in this mummy-shaped liner and works 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 3.0 x 4.7 in	5.9 x 3.0 x 4.7 in
WEIGHT	342g	364g

FAQ

Does the Reactor Extreme 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 Extreme 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 Extreme 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 fairly solid boost if the liner is used with an appropriate sleeping bag and pad.

Reactor Extreme Sleeping Bag Liner

Q & A