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Sea to Summit Sleeping Bag Liner AREACTOR Reactor Thermolite

by Sea to Summit
4.8 out of 5 stars  See all reviews (22 customer reviews)
RRP: 42.99
Price: 36.61 & FREE Delivery in the UK. Details
You Save: 6.38 (15%)
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Only 7 left in stock (more on the way).
Dispatched from and sold by Amazon. Gift-wrap available.
Want it tomorrow, 11 July? Choose Express delivery at checkout. Details
  • Lighter weight, more packable than fleece
  • Adds warmth to a sleeping bag
  • Mummy shape with a box foot
  • Draw cord hood with mini cord lock
  • Colour of liner is black
  • Packs into its own 8 x 13cm / 3" x 5" Sn240TM Siliconised CorduraR stuff sack

Frequently Bought Together

Sea to Summit Sleeping Bag Liner AREACTOR Reactor Thermolite + Trekmates Deluxe Pillow
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Product details

  • Product Dimensions: 210 x 90 cm ; 259 g
  • Boxed-product Weight: 399 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • Item model number: 119
  • ASIN: B000NQQ4VK
  • Date first available at Amazon.co.uk: 12 Mar 2007
  • Average Customer Review: 4.8 out of 5 stars  See all reviews (22 customer reviews)
  • Amazon Bestsellers Rank: 7,803 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Product Description

Manufacturer's Description

Extend the comfort range of your sleeping bag. The Reactor is made from the lightest weight ThermoliteR fibre that DuPont has yet approved. ThermoliteR is a hollow core fibre that provides extraordinary warmth for its weight and remains extremely breathable. Adds warmth to a sleeping bag or used alone, is the ideal warm weather bag. With the stretchy knit fabric that moves with you and a draw cord hood, the Thermolite Reactor liner is perfect for wrigglers and rollers or anyone who needs some extra warmth.


Customer Questions & Answers

Customer Reviews

4.8 out of 5 stars
4.8 out of 5 stars
Most Helpful Customer Reviews
27 of 28 people found the following review helpful
5.0 out of 5 stars Superb liner, great value. 24 Sep 2009
I bought this liner to use with my ageing Ajungilak Kompakt Super, for use whilst climbing Kilimanjaro last week (successfully!). It's super warm, and really helps out when you just need a little bit extra from your bag. Of course, an upgraded bag will perform better, but for flexibility to have a lighter bag for normal use and then an upgrade when things get chilly this is heartily recommended. Also, as I read somewhere else before buying, this also makes a great little pillow on those days when you don't need its warmth. Genuinely a great item and well recommended.
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8 of 8 people found the following review helpful
5.0 out of 5 stars Cheaper than upgrading your sleeping bag 27 Sep 2012
By Miss N
Verified Purchase
This was great for climbing Mt. Kilimanjaro, my group got ahead of the schedule and ended up spending 2 nights at Barafu Camp (approx. 4500m) to allow us more time to acclimatise for the summit. Our tent wasn't put up very well and the moisture that leaked through turned to ice (so I can assure you it was cold!) but this liner, in combination with my Rab Ascent 700, kept me warm. Before buying I couldn't decide whether to get the liner or upgrade my sleeping bag, I decided to gamble and go for the cheaper option and it paid off. It's soft, light weight, compacts down well into its own little pouch and you could probably sleep in it on its own in warmer climates.
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6 of 6 people found the following review helpful
5.0 out of 5 stars Excellent 5 July 2012
By D. cook
Verified Purchase
This is the smallest liner I've ever seen, and I used to work in the outdoors trade.

Much nicer next to the skin than the pertex for poly cotton used in bag linings.

As for temp rating, made a Vango 2 season bag very comfy in this crappy weather, whereas I'd shivered a little in the same bag 2 weeks earlier.

Good stuff.
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5 of 5 people found the following review helpful
5.0 out of 5 stars light and warm 8 May 2012
Verified Purchase
tiny pack, no weight at all, warm and soft to touch. highly recommended. will travel with me again beyond the Arctic Circle.
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3 of 3 people found the following review helpful
4.0 out of 5 stars Excellent addition for winter camping 9 Mar 2013
By Pete W.
Verified Purchase
Went camping this winter with a 3 season sleeping bag. Got this liner to make up the difference. It worked well. With the snow outside, it made a definite difference to the warmth of the sleeping bag.
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2 of 2 people found the following review helpful
5.0 out of 5 stars Thermal Liner 14 Nov 2012
By Katy S
Verified Purchase
This thermal sleeping bag liner kept me toasty warm on a recent trekking trip to Africa; extra warmth when I need it. The liner packed away really small and was very light to carry.
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12 of 14 people found the following review helpful
5.0 out of 5 stars Sea to Summit Sleeping Bag Liner 24 July 2012
By Lyn
Verified Purchase
After several holidays in this country and feeling cold at night (even in July/August!!) decided to buy the AREACTOR Reactor Thermolite Liner. One of the best decisions I have made. I have just been on a very wet!!!! two week cycle/camp holiday in South of England. This liner took the edge off the night time chill and I was not cold once. It also fitted easily into my sleeping bag and did not slip around and get tangled during the night. Trying to keep equipment dry was impossible with the weather we had so it was with relief, when we got a few hours of dry weather, that the liner dried out quickly. It packs away easily into its own pouch but I found it stayed so well inside the sleeping bag, that it was just as easy to leave it inside. It has a lovely soft feel to it and I would highly recommend this liner for anyone who feels chilly at night while camping.
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8 of 10 people found the following review helpful
5.0 out of 5 stars sleeping bag liner 12 May 2011
By Bert
I used this liner for the first time on the 20th April for 11 nights walking the Cape Wrath Trail. 5 nights under a basha, 5 nights in bothies and 1 night in a hostel and it was brill I would recomend it for anyone doing a long walk who likes a bit more warmth at night.
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Most Recent Customer Reviews
5.0 out of 5 stars Great for a bivi bag
I use this in a goretex bivi bag. it stops the goretex sticking to me and makes things a lot more comfortable. I can sleep in the open in a British autumn in comfort.
Published 5 days ago by P. O'Rourke
5.0 out of 5 stars Great! made a big difference to my summer sleeping bag
Made a huge difference to my summer sleeping bag in temperature. Importantly for walking it was lightweight and in combination with the sleeping bag small volume.
Published 19 days ago by Ben Prince
3.0 out of 5 stars Not that impressed.
I'd suggest buying an extra lightweight base layer top and long john's as they would do the job just as well if not better. Read more
Published 20 days ago by Sean Murphy
5.0 out of 5 stars Keep warm.
This bag liner is good particularly when the temperature outside the tent drops a few degrees. It really is effective, compact and good value.
Published 4 months ago by Fruitbat
5.0 out of 5 stars A happy addition to the travelling kit
I bought this to take to kilimanjaro. Small, lightweight and certainly warm- it was much needed. Very pleased with it!
Published 5 months ago by tamara
5.0 out of 5 stars good quality, versatile
Used this while trekking in the Himalayas. Used it on it's own lower down, where it was warmer and inside my sleeping bag when it was colder. Read more
Published 8 months ago by Olivia
4.0 out of 5 stars Added warmth when needed
I bought this liner to go inside a Alpkit Skyehigh 1000 for a trip up Kilimanjaro in September. Temperatures went down to -15C and I was as warm as toast. Read more
Published 8 months ago by EtiveGirl
5.0 out of 5 stars wish I'd got one of these years ago!
wish I'd got one of these years ago! 'Summer' here in the UK can be a lot cooler than I might like - I found this kept me warm without overheating.
Published 10 months ago by R V MCDONALD
4.0 out of 5 stars Snug as a bug
Perfect if the climate is hot, i was in Africa & didn't use a sleeping bag, just the liner, most cosy. Liked the drawstring top, keeps bugs out! Read more
Published 10 months ago by JA
5.0 out of 5 stars did the job
In fact I was slightly too warm in my 2/3 season sleeping bag and had to open my zip in the night!! Would much rather this though than be too cold!
Published 12 months ago by Katie Lorna
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