`Remember me on this computer` option

Select the `Remember me on this computer` option if you wish to be automatically logged on to the computer in future. Your account will remain active for 45 days. Please do not use the `Remember me` option if using a computer with public access or that is used by more than one person.

Sea to summit

Sea to summit Reactor Extreme Thermolite Mummy

Sea to summit Reactor Extreme Thermolite Mummy

  • Sea to summit Reactor Extreme Thermolite Mummy
  • Sea to summit Reactor Extreme Thermolite Mummy
  • Sea to summit Reactor Extreme Thermolite Mummy

Sea To Summit Reactor Extreme Thermolite Mummy

Product description Sea to summit Reactor Extreme Thermolite Mummy

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.


- Mummy shape with a box foot

- Draw cord hood with mini cord lock

- Packs into its own Ultra-Sil stuff sack <


- 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

If you are interested in Sea to summit Reactor Extreme Thermolite Mummy, you should know that it is in stock and offered at the best price. Sleeping bags products from the brand Sea to summit have the highest manufacturing quality. Sea to summit is designing exclusive outdoor products that are tailored to the customers needs. So take a look through the offers available and buy your Sea to summit Reactor Extreme Thermolite Mummy today!

Features Sea to summit Reactor Extreme Thermolite Mummy


Customer reviews and questions (21)

Write a review about this product and earn CoINNs (existing customers only)

Write a review and earn CoINNs

(existing customers only)

Thin material


The material is quite thin, slightly fleecy and translucent, I think in reality it will add 7 degrees to a sleeping bag, it stretches very well and is pleasant for the body;

Very promising


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


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


Beautiful spacious and soft material. Effective both alone and in addition to a 0 ° for lower temperatures.

Not as good as expected


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


Works Great

just got it


looks good! hoping it will work ok

Liner sea to summit


Excellent product, very comfortable, I indicate to anyone who wants to buy.

Super product


Sleeping bag thermolite bought 2 years ago and used frequently with satisfaction. Very effective in addition to a small down, warm, light.



The was true to its description! it was a bit bigger to me but super comfy.

Liner thermolite reactor extreme


Very good. I tried it at home and it seems to be very good. Excellent quality.

Super product


Sino really satisfied with the purchase, the product is excellent, shipping costs very cheap

Good Stuff


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


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.



This is a must for the cold!

Very good product


Excellent product, compact and lightweight!



Shipping was really fast The product is great!

Good price and fast


This is the great online shop, there have fast for delivery and lowest price, thanks

As expected


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


Product was true to description

Best sleeping blanket


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.

Write a review or ask our dedicated team of experts a question

Product rating

Note: Your reviews will be reviewed by our staff and posted within five working days. Your question will be answered by email, so please make sure your email address is correct.

I accept your Privacy Policy