Looking to up the warmth of your sleeping bag? Or maybe you're looking for an ultralight summer sleeping bag? The Sea to Summit Reactor Fleece Liner will happily take care of both.
This technical mummy shaped sleeping bag liner is made from Thermolite® fleece which provides a brilliant balance between warmth and weight. A drawstring hood allows you to trap in extra warmth, especially on those chilly nights. True to its versatility as a standalone warm weather sleeping bag, it has a quarter zip so it's easy to climb in and out.
Packing small in its own Ultra-Sil® stuff sack, the Reactor Fleece Liner is a must for the cold-sleeping mountaineer or the ultralight cyclist or trekker not wanting to carry a conventional sleeping bag.
Made of light and warm Thermolite fabric
Quarter zip with zip guard
One-handed drawstring hood
Can be used as a warm weather sleeping bag
Comes with Ultra-Sil® stuff sack
Max. User Height:
200L x 70W cm
21L x 15W x 15H cm
?Warm enough1 answer
Hello! Needing a liner to add to my summer ( 10 deg) sleeping bag for Tasmania hiking in September. Do you think this would add enough warmth? Or can you recommend any other products? Not really wanting to purchase a warmer sleeping bag living in North Qld. Cheers!
Ricki - Qld(3 years ago)
Unfortunately, this won't really suit. The Fleece Liner will help, but Tassie tends to have very variable weather, and most hikes are prone to the risk of snow, even in the middle of January, so we'd recommend carrying a good quality lightweight bag with you on any Tassie trip, that will suit down to around negative 5.
Leece - Snowys(3 years ago)
Which is warmer?1 answer
Hi Snowys, Which one is warmer between the Sea to Summit Thermolite Reactor Fleece Liner and the Thermolite Reactor Extreme Liner ?
Faisal - Sydney(4 years ago)
The Reactor Fleece liner is rated as adding an extra 18'C, whereas the Thermolite Reactor Extreme Liner is rated as adding an extra 15'C of warmth. So they're pretty similar, with the main difference being the packed size or the liner.
Leece - Snowys(4 years ago)
How does it compare to the Coleman Fleece Liner?1 answer
I've got a Darche Cold Mountain 1100 and a Coleman Fleece Liner. Just got back from a trip through Central Australia sleeping in a Darche Dirty Dees swag and was quite cold on a couple of nights. It was around -2 to 3 most nights so I was suprised to be cold with both the -12 rated bag and the Coleman fleece liner. Just wondering if this Sea to Summit liner is consideribly warmer than the Coleman? I'd hate to purchase another liner only to be in the same situation. Thanks!
Grant - Bentleigh(4 years ago)
Thanks for touching base, the Thermolite Reactor Fleece Liner will have fairly similar performance to the Coleman Stratus Fleece Liner. There is no official temperature rating assigned to these so it's hard to give an accurate indicator of overall performance. We'd suggest sleeping in thermals and making sure you're warmed up before you jump in your sleeping bag so you don't bring the cold into the bag.
Leece - Snowys(4 years ago)
Stock level1 answer
Do you happen to know when this item will be back in stock?
Trevor - Orange(5 years ago)
I've just double checked and we have stock of the Reactor Fleece Liner in Regular, unfortunately, the Long Size has been discontinued though so I'll get the team to remove that item from the page.
Leece - Snowys(5 years ago)
Size recommendations 1 answer
I'm 186cm tall. Will it be comfortable fit using a regular size? Otherwise, what dimensions of the long version are?
Nick - Melbourne (6 years ago)
The regular is 200cm long, so it looks like that's going to be better suited to your height as the long size is 231cm long. I apologise that we didn't have the correct specs for the long size there for you, I'll make sure that get's updated right away Nick.
Emily - Snowys(6 years ago)
if you were to use this as a warm weather sleeping bag. What minimum temp would it be rated to?
Jimmy - Sunny Dunsi(6 years ago)
Good question but one I don't want to give a definite answer to as we all feel the cold differently! I've used mine as a summer bag in warm conditions and it works well but I've also tried it in milder weather and been quite cold. My advice would be to try it out at home in the sort of conditions you're planning on using it in and if it's not warm enough you can always jump back into a warm bed! If in doubt though, take a proper sleeping bag!
Tim - Snowys(6 years ago)
Warmest option1 answer
Could you please tell me the difference between the Sea to Summit Thermolite Reactor Fleece Liner and the Thermolite Reactor Extreme Liner - is one warmer than the other?
Many thanks :)
Sophie - Sydney(6 years ago)
The Sea to Summit Thermolite Reactor Fleece Liner is designed for camping and doesn't have an official temperature rating. It's also made from a fleece material making it a thicker fabric than many other liners. The Sea to Summit Thermolite Reactor Extreme is designed for Hiking and Trekking and has a temperature rating that adds an additional 15C to your sleeping bag. This is made from a thinner fabric to keep weight down.