Sea to Summit Reactor Insulated Sleeping Bag Liner

An absolute must for campers. It is insanely comfortable and warm. I am wearing as I write this review. I was shivering in camp last night under my down blanket. I woke up and put this bad boy on and slept like a babe the rest of the night. Love it. I have the breeze one for summer as well.

Kept me pretty warm with my 32F down sleeping bag in 25F weather. My feet got a little cold but wasn’t bad enough to keep me up all night.

I bought this to store in my camper as a 'just in case' item or spare, and have been very pleased with it. It definitely adds warmth to a main sleeping bag without making one feel clammy inside, and it works nicely as a light bag on warmer nights. The open footbox adds further versatility (you can close it with a drawstring for maximum warmth) too. If you're through-hiking the AT, it's too bulky and heavy to justify taking along, but if you do RV camping or are going out for one or two nights and expect variable weather, this is a very worthwhile addition to your kit.

Got the standard fleece (84 inch) because the full fleece long wasn’t available when I received as present. 6’6’ barely fits. I would request that the zippers going down the whole way would be ideal although it would add a bit more weight. Then it could be used around the campsite as another ultralight grid fleece layer without taking off shoes. Also, what’s the deal with sea to Summit using SBS zippers? My understanding is this is a somewhat more reliable Chinese brand versus a no name Chinese brand, but is not comparable to a YKK Zipper in an allegedly high-quality and expensive product like this. I have multiple sea to summit pieces, including cooking and their ultra sil and lightweight packing bags and have been happy with those thus far.

Bought for my Virginia hike at the end of November. I wanted lighter weight and someone to keep my body heat inside. I've tested in my hammock at as low 35 degrees and has kept all cold air from flowing it! It's affordable and quality is great! Also, the pooch joins me on our nightly hammocking and he loves the warmth of it as well!

Son loves, very comfy!

I used this for several nights in 30 degree temps as a liner in my hammock, combined with a 20 degree top and under quilt. With just the 20 degree quilts I would have been way too cold with the wind chill. However this liner provided more than enough extra insulation for the conditions. Also, the easy close foot box made it very convenient to get in and out of, especially with the added difficulty of hammock camping.

Expensive, but very cozy

Great item, thank you.

Smells!

Bien mais le gain de chaleur me parait tout de même trés surévalué. Agréable et confortable.

Pratique et chaud