Sea to Summit Reactor Insulated Sleeping Bag Liner

Did not expect to like this thing since I have restless less and claustrophobia... BUT this is a wonderful piece of gear for my cooler backpacking trips. I have a sierra cloud10 down sleeping bag comfort to 25F, but we headed out for early Nov trip in upstate NY/CT border... temps down to upper 20s so didn't want to risk it. The liner didn't tangle around my legs, nice drawstring around my head and arm holes for functional access. Nice and toasty!!! Liner also served double duty as a leg warmer/blanket while making breakfast on a cold morning. Was skeptical at first, but so glad I bought this thing. Worth the extra ounces in the backpack!!

Amazing addition to your sleeping bag system. Must have. I use during summer months with summer bag, and did several days ok @ 40F nights

I'm pretty skinny. 6'4" and 180lbs. I'm always cold at night. I got this, and I was still pretty cold. Maybe it took the edge off, but I'm not sure how much of a difference it makes. I'll keep using it though.

Love it! I get cold and having this extra layer made me just warm enough while camping. Also great size for just a sheet on top of my sleeping bag. Really light weight. Took to Philmont Scout Ranch! Totally worth the money for me!

Light weight, warm, soft, exactly what I expect from an expensive but quality made sea to summit item.

Currently own a 20 degree bag and saw that the lows were going to be in the teens for my winter camping trip. I don't mess around when it comes to comfort in my sleeping bag in the winter. This liner did the trick! Slept in long-johns, wool socks, and a flannel and woke up perfectly comfortable the next day. I've had multiple friends buy the liner since that trip.

These really add extra warmth to your sleeping setup out in the back country. It's very light and compact when stored away. The liner is super comfortable on your skin and doesnt feel weird at all.

I’m a cold sleeper so I was a little worried when the temp dropped way lower than seasonal normals on my last backpacking trip. I have a 20 degree bag with temps at 36. I purchased this liner and actually woke up sweating! Not only that, but it’s functional- I wore it all morning since your arms are out and you can raise it to a comfortable level on your legs. I would buy again and can imagine using only this during the summer!

Das Ding ist echt warm. Ob als Zusatz in kalten Gebieten oder als Haupt Schlafsack in passenden Temperaturen. Kann man machen 👍 ich finde vor allem die Öffnung unten auch sehr gut, dann kann man doch auch mal bei Kälte raus und verschwendet nicht gleich die ganze Wärme :D die Größe(ist klein) und das Gewicht ist es mir auch Wert es mitzunehmen. Bei richtiger Kälte ist nicht zu spaßen.

No lo he utilizado todavía pero cumple con la descripción

Ho utilizzato questo supporto per 7 giorni in un campo scout i primi di novembre '24 con una temperatura notturna esterna di 10°C circa ma molta umidità, zona VT. Utlizzata con sacco a pelo nuovo con temperatura comfort +5°C , tenda invernale e ben isolata. Premetto che ahimè sono una persona molto freddolosa,ma nonostante i doppi strati di intimo termico,pantaloni di pile,maglia di lana e maglia di pile la notte ho sempre avuto freddo. Il materiale si lega con gli altri tessuti per cui limita i movimenti. Pro:facile da piegare,compatto e leggero. Si lava bene in lavatrice e non stinge. Sicuramente lo userò nelle route estive al posto del sacco a pelo o sacco lenzuolo ma in inverno tutta questa differenza di comfort termico non l'ho vista. Peccato perché l'azienda ha sempre ottimi prodotti.

Fantastic, far superior to the others I have tried

Matériaux très doux, très agréables pour dormir, surtout si l'on utilise un duvet technique qui n’est pas très confortable habituellement. Une sensation de chaleur est aussi observée