I've been looking to buy an emergency blanket/bivvy and I'm having a hard time figuring out what the major
differences are between these three: Adventure Medical Thermo-Lite 2.0 Bivvy Sack, Adventure Medical Kits
S.O.L. Thermal Bivvy and the Adventure Medical Kits Bivvy Sack Thermo-Lite Bivy. It's obvious that there are
differences in the prices and the weights and I know someone has probably done a review of these 3 on the ETS forum. Before someone curb stomps me... I would like to have peoples opinions on which is the best to buy. I
plan on putting one in each vehicle and want to use one for camping in warmer weather or as a liner/cover for my Big Agnes Thanks in advance and I apologize if this subject has been beat into the ground in a previous post, I had no luck finding anything when I searched.

I'd get the Heatsheets 2-person sized blanket. I don't have the AMK bivvies you speak of, but the Heatsheets gear seems to have the best reputation for reliability for anything that will fit in your pocket.

The cheaper ones are lighter, which is often what you want when hiking. The Heatsheets Emergency Bivy, around $16, weighs about 4 oz. For #34, the Thermo-Lite weighs close to 7 oz. It is probably a little warmer (I have not yet had to use either of these for real).. The Heatsheets is what I tuck away routinely, and I will bump up to the Thermo-Lite when I can afford the additional weight and conditions might be a bit more severe. I have no experience with the SOL version, but I doubt that it is radically different.

I don't know why you would bother with any of these in your vehicle. Weight won't be a major consideration, so throw in a full bag that will keep you snug and warm.

In trials in my living room, I have noticed a fair amount of condensation. Others have made the same observation. Nontheless, In a tight situation, I would welcome any of these models.

I keep a ThermoLite 2.0 in my bag and love the thing. It's basically a space blanket that's on steroids. It's a lot tougher than a regular space blanket, not as noisy, and it's made into a sleeping bag.

As stated above, condensation is an issue, but it has venting to help cope with that and it's very warm for a sleeping bag that packs the size of a Coke can and only cost me $30 or so.

I'm a big fan of bivy bags. Turning a sheet into a bag (or "cocoon") is finicky and prone to failure. Turning a bag into a sheet takes 15 seconds with a knife (go slow or you'll create rips where you don't want them.

In cold or wet weather, you'd probably want that cocoon about 95% of the time anyway.

have a look at my "foil bag fail" post of a week or so ago.

I agree. For each car I pack a big sleeping bag (often two) and a fleece blanket.

Teacher

Thanks for everyones' thoughts.

Hikermor and Teacher, Keeping warm is only one of the many things possible with an emergency blanket/bivvy. After all, isn't having
one thing with multiple uses better than multiple things having only one use?

I don't know if I worded that right, but I hope you get the jest.

Thanks again