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Increases sleeping bag performance by up to 25 F (14 C) with super-insulating 110g/m ThermoLite® fabric. ThermoLite® is a hollow core fiber that provides extraordinary warmth for its weight and remains extremely breathable. Spacious design allows for a comfortable nights sleep, even when the mercury plummets. Perfect for extending the season of your sleeping bag.
Features:
- Mummy shape with a box foot
- Draw cord hood with mini cord lock
- Packs into its own Ultra-Sil stuff sack <
Specifications:
- Length: 84 in/
- Width: 36 in /
- Weight: 14 oz/399g
- Temp Rating: Up to 25 F /Up to 14 C
- Dimensions: 84 in / 210cm x 36 in / 90cm
- 110g/m2 ThermoLite® construction throughout
- Adds up 25°F (14°C) to warmth to a sleeping bag
Do you love outdoor? Get your Sea to summit Reactor Extreme Thermolite Mummy Liner and enjoy your leisure activities with the security and confidence which Sea to summit gives you. Don´t forget that we have an great range of Sleeping bags for all sizes and weather conditions. In order to give you the most effective outdoor models possible, most of our Liners and blankets items have been designed in collaboration with the pros!
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4.86 / 5
71 Reviews
Good heat supply
Margo - 26/11/2023
Good complement to the sleeping bag. Soft and warm. Really adds extra warmth.
Great liner but...
Nick - 01/11/2023
The liner is cool but large in volume, it’s easier to buy a down lining, it will be warmer
Very useful stuff
Albert - 12/09/2023
Warm, nice feeling, lightweight, best accesorie for a sleeping bag.
Proof
ALEXANDRU - 01/09/2023
I used the sleeping bag liner in a tent without a sleeping bag (also without a tent) at temperatures around 10°C/50F at night. It was cold.
The size and weight are very agreeable.
Genial
Cris - 20/08/2023
Perfect, warm and very pleasant touch.
Fast delivery and on time for the next trip
Diogo - 11/08/2023
arrived super fast. I will use it inside my summer bag for camping above 2000m.
Thermolite reactor extreme
monica - 12/07/2023
great price material pleasant to the touch. Delivered in 17x10 bag I have yet to try it.
Very light
Juan Carlos - 18/05/2023
It is very light, it only weighs 390g and gives the bag that extra layer
Great product, service and shipping
AT - 05/05/2023
Have not used this as yet but many have commented on this SS liner product. Just like to put in a review on the great pricing, service and fast shipping of this product to Singapore. Will definitely patronise again
Great
Carlos Eduardo Garza Gil - 25/04/2023
It is an excellent product, it increases the heat a lot, I am glad I bought it, I am no longer cold in the mountains.
Responds to the characteristics
Olivier - 16/04/2023
The bag is lightweight and compact. I'm waiting to see if it meets my expectations regarding warmth!...
Perfect
enric - 03/04/2023
Just what I expected, delivery on time
Great
Miguel Bessa - 28/02/2023
I have already tried the product and it is exactly what I wanted. Comfortable and warm Fast and hassle-free delivery!
Sack wonder
Alberto - 20/10/2022
Super happy with the purchase. It's very warm and comfortable to sleep in, and you really feel the difference when you get in and out of it. A spectacular purchase
Excellent product
kaizen - 04/10/2022
Garment quality, just what I expected
Good material
Danial - 20/09/2022
Very fast delivery and good item material very best quality Thanks you
Great
Belchior - 31/07/2022
I have used this liner in the hostels of the Primitive Way of Santiago, July, and it is more than enough. Simply perfect. Now as a piece to increase the insulation of the sleeping bag, I think it will be very good. Trekkin service to Portugal, excellent.
Good shipment tracking
Francesca - 04/12/2021
Optimal delivery time, it took 2 weeks and a half, well protected in its packaging, it arrived without news and apparently it looks impeccable, I just need to test it to see if it really resists the temperature it says
Sleeping bag liner
Lee - 02/10/2021
Amazing and fast shipping
Hot
David BIHOREAU - 03/09/2021
Very good meat bag, very hot. Complements well mob comfort down 0 ° C in negative temperatures down to -10 ° C
Insert
Platon - 18/08/2021
An excellent insert in a sleeping bag, corresponds to the description, warm, compact and comfortable.
Perfect
Benbont - 06/08/2021
This product is really great, you really feel the difference when you add it to the down, plus it's light, it's perfect.
Good product
Damir - 15/07/2021
all is perfect, recommendable
Bed bag review
Sandro Savoriti - 22/06/2021
Great product all ok Great seller
Meat bag
Christophe BAQUERIN - 20/05/2021
Very satisfied with this purchase.Effective in cold weather.
Good and useful product
Iris - 28/04/2021
It increases the warmth of my sleeping bag when it's super cold and It works great as a lightweight sheet when the weather's too hot. It's soft, easy to wash and dry.
Well
mikel - 27/04/2021
It weighs and bulks little. recommendable
Excellent
BONDIL - 12/04/2021
Exactly matches my expectations. To sleep in a refuge or in a tent in summer, it works very well.
Brilliant!
David Gilbert - 02/04/2021
Really does add extra insulation, I can now use my lighter 2 season bag when I would use a 3 or even 4 season! really happy with it
Very satisfied with this product.
Christophe CHEVALIER - 07/12/2020
Very good product, large ideal size, a more question of heat for all winter hikes, likewise can be used alone in summer by adding only 5 to 6 ° more. This is a product that I highly recommend, I myself really not disappointed with this brand.
Nice product
Dylan - 06/12/2020
Really good quality but adds more like 7 degrees which is blow what is stated.
מצוין
Shiri sarfati - 27/11/2020
הגיע מהר ומוצר מצוין!
Not to bad
Dylan - 08/10/2020
Haven't used it outdoors yet but is a nice and light bag liner
Toasty!
Daniel - 08/09/2020
Love it. Adds a suprising amount of warmth. Needs to be used in conjunction with your main sleeping bag/blanket.
Great product
Antoine luro - 07/09/2020
Compact, light, warm! Tested this weekend in the D'ossau valley by 5 * and I am very satisfied. To recommend +++
Just perfect
Sylv1 - 26/08/2020
Does not take up space, light, stretch so as not to feel cramped and ESPECIALLY keeps really warm. In the mountains, it has my sleeping bag perfectly and at low altitude, it alone was more than enough.
Review
Martin - 23/08/2020
I was very much in doubt whether it would work with my thin cheap 13+ Celsius sleeping bag. And I must admit that my doubts were put to shame. I slept snugly and safely all night because of the Sea to summit Reactor Extreme Thermolite properties. Brilliant.
Great insert!
Kirill - 10/08/2020
It's really warm with it! In the warm season, you can use it autonomously.
Perfect!
Gareth - 31/07/2020
I bought this liner to give a bit more warmth in my sleeping bag, and it hasn’t disappointed! I’ve turned my 3 season sleeping bag into a 4 season sleeping bag. I use the liner on its own during warmer nights or sleeping in huts with a fire, or use it with my fully zipped up sleeping bag while camping outdoors in the cold. It’s perfect!
Internal lining
Jonathan - 20/07/2020
I use it as an internal lining and as a sole bag in warm seasons, it does not give the 15 degrees it says but about 7 or 8 if
Bag
danilamaster5921@gmail.com - 08/07/2020
Very cool. Quality 5+ and fast delivery.
Good
Aleksandr - 24/06/2020
Great earbud, light and compact. The fabric has really good stretch. Haven't checked temperature yet.
Good product
alain lapeyre - 20/06/2020
Compact, light and versatile. Very good product.
Very light and warm liner
Remi Barbosa - 17/06/2020
I bought this liner to complement my sleeping bag under colder temperatures but I have used it many times by itself during warm nights or when couchsurfing. It packs really really small and the fabric is soft. Overall, I am just not giving it 5 stars because the price is quite expensive.
Superb spoon
Constance - 23/05/2020
Very efficient light spoon with long handle. I placed a thin leather cord in the loop to replace the carabiner (life-size tip) for more lightness
Great addition
Erin - 17/03/2020
Very warm. Can be used as a summer bag or makes a sleeping bag far more comfortable in winter. Light and packs down well
Nice product
E.N. - 24/02/2020
Fast and accurate delivery. Very useful product for campers. No need to wash so often the sleeping bag. Adds warmth inside the sleeping bag.
A plus to complement the bag
doh - 25/11/2019
I would not know how to quantify the degrees it brings, but it adds comfort and versatility. Since it can be used with any bag, improving it. Very light and compactable. I alternate this one with a silk sheet bag with any of the bags I have, summer or winter. Good finishes
Like it
Vera - 25/10/2019
Use it instead my sleeping bag, end of August and all September. Nice and soft, very light. I was more than satisfied :)
Supplement to the bag to improve it
Doh - 30/09/2019
Thin and light I do not think that it contributes the 15 degrees that it announces, but yes half, I will have to verify it. To the touch it is very nice and comfortable. Next to a silk sheet sack, it will be my ideal complement to play with the two sacks I have, and better adapt to the different conditions.
At
Perminov - 23/09/2019
looks good! hoping this will work fine
Very good
Isa - 22/09/2019
Very good product. It does not take up space, is pleasant to the skin and is extensible. It's perfect in shelters. I did not have time to use it with a down and in more difficult conditions, so I can not judge the temperature gain.
Very promising
ck - 24/06/2019
Very flexible, comfortable and does not take up a lot of space. Much more promising than cotton or silk products that I have already tried. Like all these types of extensions, it does not produce heat but only concentrates / reflects the heat of the person who occupies it.
Good staff
Alexey Tsarenko - 07/06/2019
Very good extension for sleeping bag. Not so warm as in spec. (but it expected). Adds about 5-8 C to sleeping bag in extremely conditions.
Sts reactor extreme
Pier - 05/06/2019
Beautiful spacious and soft material. Effective both alone and in addition to a 0 ° for lower temperatures.
Not as good as expected
laria - 04/05/2019
I have both versions (this and the compact plus) and the truth is that there is not much difference in terms of temperature increase. also this version to be all red, does not identify easily which is the back of the front, which is complicated in terms of what situations.
sea to summit reactor
Mathew Brown - 23/04/2019
Works Great
just got it
ron - 26/12/2018
looks good! hoping it will work ok
Super product
annick - 20/08/2018
Sleeping bag thermolite bought 2 years ago and used frequently with satisfaction. Very effective in addition to a small down, warm, light.
great
sohini - 24/07/2018
The was true to its description! it was a bit bigger to me but super comfy.
Liner thermolite reactor extreme
Alberto - 09/06/2018
Very good. I tried it at home and it seems to be very good. Excellent quality.
Super product
Veronica - 09/04/2018
Sino really satisfied with the purchase, the product is excellent, shipping costs very cheap
Good Stuff
Moe - 09/01/2018
Ordered this liner based on reviews and I wasn't wrong. The item is great; shipped quickly and was true as described.
Warm and comfy
Mihail Sergeevich - 07/01/2018
The material is soft and the bag has room for my feet. I really like this product and sometimes use only the liner in the summer.
Comfortable
Amid - 02/09/2017
This is a must for the cold!
Very good product
Fromont - 28/06/2017
Excellent product, compact and lightweight!
Shipping
Gal - 08/02/2017
Shipping was really fast The product is great!
Good price and fast
Mak - 26/01/2017
This is the great online shop, there have fast for delivery and lowest price, thanks
As expected
LK - 15/12/2016
I havent camped with this yet but it´s super comfy and surprisingly light and small. My boyfriend has the compact plus but this one is hardly any bigger so I think it´s worth it.
Sea to summit thermolite mummy
Peri - 11/12/2016
Product was true to description
Best sleeping blanket
espen dyngen - 22/11/2016
Best lake bag fins. Have tried many, but none can compare with the sea to summit. Recommended. Got toll and fee as well as saved only 50kr to order here.
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