The Reactor Fleece Liner built from hollow-core Thermolite® Pro fibres used in a grid-pattern to deliver our warmest sleeping bag liner and the core of any quality cold weather sleep system. You can regulate your temperature using the shoulder zippers and drawcord footbox, which also align perfectly with the Free Flow-Zip system of Sea to Summit sleeping bags. The versatile Reactor Fleece Liner delivers comfort across multiple seasons or can even be used as a stand-alone sleeping bag in warm weather. 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
Hollow-core Thermolite® EcoMade fibres are used in a grid-pattern fleece for maximum warmth retention
Drawcord footbox 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
A mummy shape designed for maximum thermal efficiency and includes shoulder zippers and footbox drawcord for additional temperature regulation
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® EcoMade Polyester
SPECIAL: Bio-based HeiQ Fresh Odor Control

	COMPACT	STANDARD
DIMENSIONS	78 x 31.5 in	85 x 31.5 in
PACKED SIZE	9.8 x 3.5 x 5.5 in	9.8 x 3.5 x 5.5 in
WEIGHT	390g	420g

FAQ

Does the Reactor Fleece 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 Fleece 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 Fleece 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 significant boost if the liner is used with an appropriate sleeping bag and pad.

How does the HEIQ-Fresh work?

The liner is impregnated with bio-based amino sugar polymers that absorb and neutralize odors. When the liner is washed, the compounds that cause odor are released, and the polymer is ready for the next use

Reactor Fleece Sleeping Bag Liner

Q & A