Sea to Summit Sleeping Bag Liner AREACTOR Reactor Thermolite

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.

Lightweight and rolls up tiny, keeps your sleeping bag clean and allows you to turn in the night without your bag turning with you. Easily washed and dries quickly- although watch it if you are drying over a fire or stove as the material melts easily. Nice feature of a light coloured band round the to so you can see how to get in even in low light and the drawstring does increase the warmth in icy conditions (it opens with a pull so no danger of strangling yourself with it). Very good.

This is a good piece of equipment to provide a very moderate boost to warmth on a cold night. You can forget about the claimed 8°c boost, it's more like 1-3. It feels nice and warm next to the skin, wicks away perspiration, increases general comfort and helps minimise drafts. It also keeps you sleep system cleaner.This is not a very efficient way to boost the warmth of you sleep system. 0.24kg for a 1-3°c boost is weight inefficient so bare this in mind. This item can take a summer sleeping bag about half way into the autumn season. It can't do much more.

I crossed the Atlantic Ocean on a small sailing boat using this.It's perfect for warm environments and even when it's a bit chilly, it offers some protection and something to get cosy inside of. Feels lovely and soft. Rolls up easily and stuffs back into it's bag fairly quickly too - important when you're a yacht racer :) Washes easily.Useful if you want to sleep and protect yourself from lying straight onto a surface with no sheet.For colder environments you'd need a blanket or much something much thick. Anything under 15 degrees C and you'd be cold I think.

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.

I bought this to add some TOGS to my four season sleeping bag for trek and wild camping at altitude 4000metres. It kept me warm, it's lightweight and rolls down in small pouch, and is soft and comfortable on the skin. And like Merino base layers it didn't make me sweat. It performed well on several trips but lost it on last one. I will buy again.

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. I didn't need to use the liner until the last couple of nights when the temperatures were well below zero. The bag was advertised as being good to -12C, and it was but the liner just gave me an extra bit of warmth and comfort.It packs up very small inside the stuf sack and weighs next to nothing, so doesn't ake up any extra space in your rucksack.I'd recommend this product to prospective purchasers.

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.