Watch before you buy - Sea To Summit Liners Thermolite Reactor Extreme Fleece 

Oh that’s interesting- do you know what it’s called?

I like the idea. Tired of seeing simple bedsheets being sold for extravagant prices as hiking gear. After reading this I've decided to sew my own, as it is not even hard, and I have extra bedsheets, fleece blankets, even a light (but itchy) wool blanket which I suspect will be perfect for this. It'll be hard not having zippers in them, for adjustability, but the modularity might be enough for adjustability. I'm thinking a basic thermal layer, then a cotton/silk liner, a fleece liner since it's so soft (followed by the wool If I end up sacrificing that one too), and a Bivvy bag on the outside. All cut and sown into mummy shapes with maybe a draw cord on the fleece to synch it up closed. the bivvy can hold the pillow in the head slot. If all goes well, this will be enough to replace a sleeping bag down to cool temps, and a synthetic 10ºC sleeping bag will likely take me down to freezing temperatures. I do plan on wearing more layers to help with the cold, as some people have reported not having to even bring a sleeping bag on summer tours/hikes, and I even know a girl who uses a 10ºC bag in negative Celcius temperatures by layering all her clothes, followed by the reactor liner, the bag and a bivvy.

Awesome! Yeah you would not have liked it…

Haha nice one Thanks 🙏

Merci Jacques Yes indeed, it was not what I expected either

Oh wow that sounds like design by committee. Bunch of compromises to make all the stakeholders happy but nobody thinks about the user…

Happy to hear. Thanks for watching 🙏🏻

It’s a tapered design indeed so expect it to be more narrow but the fabric is stretchy. If you really want extra space then perhaps the yellow one on rectangular shape would be a better option?

Is that one nice? Not too slippery?

@@OutdoorPrep nice but yes very slippery but it’s easy in and out

Oh that one looks nice. Let us know how you like it

Yeah I don’t know how they’ve measured that temperature. Glad to hear I’m not the only one that thinks this 😉

Have you used it by itself for summer campings? If so, what would be appropriate temperature range for it?

@@majamidzor3801 it's very hard to give a temperature as more factors come into play. If you're in a valley the air pressure is higher and the temperature will drop, especially at night. Humidity will also have an effect and so will the shelter of choice (wind / no wind). That being said, I've used it when it was around 28 degrees during the day, then dropped to around 18 at night. So if you're till comfortable outside in shorts, then you'll just want something to cover yourself with when you fall asleep and your body temperature drops. Hope this long answer helps :)

@@OutdoorPrep hey is there any liner you could recommend to me for the sleeping bag: Big Agnes Lost Dog 0 Degree Sleeping Bag Main concern is moisture (pacific northwest shit) lots of rain and thus moisture. The other is warmth. Lastly I would say something below 80 dollars would be... A perk but not as required as the other two necessities I listed. Thanks man.

​@@nate7629 hmmm the moisture mentioned in the video is from your body. I think in the PNW you have moisture from the outside so a liner on the inside will not help... In that case you could look at a small quilt to put OVER your bag and with that protect it from the moisture inside of your tent.

Hey You’re welcome 🙏 I’m 196 / 6’4

Yes I have. When it’s too hot to actually use it when going to sleep. At that point I would only cover myself with it and later in the night as the temperature drops and my body temperature drops as well I would get in and it does a good job at trapping some heat in. A fleece blanket does the job too but is a bit bulkier.

Well, after using the orange one in late spring(maybe 14~18°) with a 4season tent without another sleeping bag around it (next to small lakes...so wet air) I wouldn't suggest to do so. Without an outer shell it felt like the cold got into the bag faster than my body could heat the air up. I was freezing. Tried another night in summer with the orange liner only. Ended up saving my kidney by wrapping a towel around me in the middle of the night shivering for the next hours...yes, I like dumb experiments...so you don't need to try It doesn't replace a summer sleeping bag. BUT I love it in winter...Adds comfort and warmth. 0° Comfort Decathlon Sleeping bag + the orange Reactor Extreme + Exped Venus Extreme II tent at -12° was okaaay

So far I have not found another one, Pete. These days I don’t use if often anymore because of it’s weight and size. Silk liners can be smaller and lighter but don’t provide as much warmth

Assuming you’re already wearing a base layer, a liner allows you to regulate the heat a bit better, and you can always shake it a bit to “dump the heat” like you can with your sleeping bag. It’s a bit harder to do with a extra pair of long johns. Also it might be too tight for comfort but that’s personal. The liner you can also pull over your face a bit. Hope this helps and makes sense. This is why I use it but don’t feel like you need to have it. Use what works for you. If that’s clothes then just do that. Happy to hear you got the Kajka - brilliant pack!

@Rob | Outdoor Prep thanks! Will keep this in mind when looking for a new sleeping bag.

have not seen this one personally. It says 450g on a website. Seems similar in size and weight. What do you like more about this one?

@@OutdoorPrep yes, not very light but I use it while not backpacking. It's roomy, rectangular, just love the feel of it. Price was also not bad if you look around for deals. The brand I like a lot, high quality. I have their sleepingbag and it's fantastic in all aspects! (the BIOPOD DOWNWOOL SUBZERO COMFORT) It's a mixture of down and wool

For warmth a quilt is great. If you’re hiking on a “dirty trail” then a liner can help keep your bag clean 🧽🤷🏻‍♂️

Haha send them an email 🙏🏻

Orange if you want something lightweight, if you want more warmth then red.

Haha which one did you buy? As for the Rogen - happy to chat to you about it. I’ve bought and returned two. Have some strong opinions agains it… might be ok if you’re not that tall and are planning on using it solo. Otherwise - measure it and make sure to buy from a store with easy returns.

​@@OutdoorPrep Already got the Rogen so a little late now. Intending to use it solo anyway, but it should really be advertised as a 1.5 man tent at most as I can't imagine 2 people in it. Starting a world cycle tour next year so was looking for something comfortable, freestanding (so can be used as a bug shelter in dry and hot conditions), reasonable ventilation options (I like the top pole that pushes the external door zip away from the inner), and with plenty of vestibule space for all my panniers. For the liner, I got the reactor extreme as I wanted something stretchy. Also got the coolmax one for hot weather although that might be unnecessary weight to carry! Really enjoy your reviews! I think I could also have gone with the Anjan 2, but would prefer something free standing and a bit worried about getting a wet sleeping bag at my feet!

You could sure but I think there are cheaper options of that is how you want to use it. Just what you would use on your bed too

hahaha aside from the warmth - how was the silk liner? stretchy at all?

@@OutdoorPrep the silk liner had no stretch at all , comfortable enough but was wanting a little more , my down bag has a comfort rating of 7 however even n thermals in a Scottish summer I was a little cold 🥶 so rather than a new bag which I’d want a liner anyway I thought… why not try the reactor.

@@stickyprickle How did you get on with your 7c Sleeping Bag and the Reactor Liner? Did it make much of a difference to your comfort? I have just tried the Snugpak Traveller bag (Same as their Jungle bag) and it is supposed to be a 7c bag, but was too cold in 14c, but fine in 18c! I do see that the EN rating assumes that the user is wearing thermals top and bottom, socks and a hat when they come up with the comfort value.

@@simonjprince hi, yes better but still not comfortable, I think I will need to buy a much warmer down sleeping bag

And a better sleeping mat too, I have my heart set on the thermostat xtherm

Haha yeah - I only have the red one now but even that one doesn’t get much use… 🙈

Yes. It’s nicer if you have some room to spare and it doesn’t have to be tight.

Personal preference I think. Both can achieve the same result

​@@OutdoorPrep would it be better to have it in shape of a backpackers quilt, to use inside sleepingbag. Looking for broducts that don't exist again :)

Oh that’s interesting. How’s the E-Vent been performing in terms of breathability?

but more down fill means it’s always there 🤷🏻‍♂️

3-5 degrees Celsius?

Yeah I don’t know how they came up with that number. I don’t carry it anymore, do use it when car camping 👌🏼

I can't imagine why honestly... And what does a sailor know about sleeping bag liners? Especially a thicker bag would not fit either...

@@OutdoorPrep wanted zo say a seller sorry but anyway. Juat the fact the material is so soft, so weird to have it as a all cover up

Eventually great to have your feedback thks

Nope

@@OutdoorPrep Dang! I’m looking for on that does. I don’t like to much confinement. Thanks for replying.

The fleece one does have a zipper but the fabric is not that stretchy. If you don’t like confinement - make sure the fabric is stretchy. You will notice that more than the zipper. Aside from that - maybe reconsider getting a liner. I’ve stopped using it.

How are they not the same?

Yeah problem with that is that you can’t make the bag colder. Unzipping is not the solution in very cold climates unfortunately.