Sea to Summit Reactor Insulated Sleeping Bag Liner, Regular (83 x 35)

Took this on my first backpacking trip to Death Valley in January (3 nights). It was colder than expected. The second night so cold our water froze. This liner not only made my sleeping bag cozy but added every bit of extra warmth advertised and some. Well worth the extra money and space in the pack. This will be a staple piece of my sleeping gear even in warmer weather - it adds that extra bit of comfort and to any sleeping bag. I also love the lining between dirty, several days into the trip body and the sleeping bag. It’s super easy to toss the liner in the wash and keeps the sleeping bag from having to be sent out for cleaning after every trip.

I was motorcycle camping this weekend in the Tahoe National Forest with the temperature at night in the high 30's and I knew I would be cold based on my past experience with my sleeping bag and insulated air mattress. This bag liner fit the bill perfectly as it added just the right amount of warmth plus also did not take up much space given that I had to carry everything in my saddlebags.

I try to go light weight and use a snugpak jungle bag and this is great for some extra warmth.

This really works to add several degrees of warmth. In a recent campout, I was shivering in my 19F sleeping bag when the outside temperature dropped to around 30-32 F, but it stopped once I put it on. However I am not using it as often as I should because it is, to me, a hassle to get in and out of this bag. It is basically shaped like a sleeping bag and you have to use the zipper on the side to get in and out. Because it is thin, it can cling on to you as you try to get in and out. Doing it in a sleeping bag and in a tent with not that much room is a pain. Imagine you have to get out to go to the bathroom in the middle of the night and come back to crawl back in in the dark ...

This allows me more flexibility with my sleeping bag. When I need the extra warmth, there it is! It takes up a small amount of space. Perfect for my purposes.

"Up to 14 degrees warmth" is super optimistic, in my opinion. I have a 35F-rated (and well reviewed) bag and I was very uncomfortable in it on a 37F night even using this product. It's just too thin - air goes straight through it, so it doesn't really "insulate". It's also very narrow in the foot area, and if you don't get into it just right, and it gets twisted or bound up anywhere, you run out of length and your feet get jammed up.For the 9oz and $50 this adds to your load, on a short trip you could do better with a few "mega warmers." Walmart also regularly offers sells a 4'x5' fleece blanket for $2 (not a typo) that's a denser weave than this yet still only weighs 10.5oz. It doesn't compact quite as much but it comes close, and you can double that up on top of you if you're a ground-sleeper with a good pad. You could even make one yourself out of raw material of any weight you like.I don't mean to be overly critical. The product is well made, it definitely packs the tightest of any option, and it does add some warmth - not 14F, but more than zero. I just personally don't think it's worth anywhere near $50. If this was priced closer to $20 I might reconsider it.

I went on a substantial trip about 70 miles into the Utah desert in early November.I discovered that I had COVID on the first night, when I woke up with a fever, sweating and shivering uncontrollably. My sleeping setup has been fine for similar conditions in the past, but when you mix in a fever, you get sweating and hypothermia even with proper gear. I managed to stuff this liner into my bag after waking up and, despite it effectively feeling like just t-shirt material, the bit of additional dry insulation made a huge difference and I was able to comfortably sleep through the rest of the night.Not sure if I would have actually died if I didn't have this liner, but the thought has certainly crossed my mind.

This has been a great addition to my sleep system, especially when night time temperatures have the possibility to vary from near freezing to 50+ degF! Given the weight (~9 oz. with the stuff sack) and compact size (<half the size of a 1L water bottle) it is easy to carry as a supplement to the sleeping bag for colder nights or using only this on warmer nights. The fabric is very comfortable and breathable. Very happy we added these to our packs on our recent trip!!

Para fazer trilhas, peregrinações ou caminhadas com locais para dormir programados, o line é uma excelente opção, pois seu peso é pequeno, ocupa pouco espaço e aquece bem com pouco frio.

Hafif, yer kaplamıyor ve işini görecek gibi duruyor. Sea To Summit kalitesi..

Funciona bien

Der Reactor Thermolite Mummy hat sich auf meinem Schwedentrip (im August) einen Dauerplatz in meiner Ausrüstung verdient.Auch wenn sich das Material sehr dünn anfühlt, so ist die Wärmeleistung doch enorm. In lauen Sommernächten konnte vollständig auf den Schlafsack verzichtet werden. Der Terhmolite Mummy fühlt sich darüber hinaus sehr angenehm auf der Haut an. Auch ist die Verarbeitung tadellos. Als etwas aktiverer Schläfer konnte ich mich ohne Probleme darin bewegen und hatte auch nie das Gefühl, das Material zu überstrapazieren.Extrem kleines Packmaß für die Leistung (passt sogar ohne Probleme noch mit in den Packsack vom Schlafsack rein), kaum Gewicht.Definitive Kaufempfehlung!

l'ho provato ma a temperature più alte di quanto previsto, ma tiene più caldo di quanto si possa pensare. è molto leggero e appare sottilissimo, ma la fibra cava con cui è fatto lo rende molto performante. Sea To Summit è una certezza, il prodotto si paga, ma la qualità è eccellente. oltretutto è molto morbido, non dà fastidio sulla pelle e non irrita le parti intime, cosa molto importante per me che dormo nudo