You know, it's an interesting idea, and if it was $5, I'd probably get one or two. I might even try one at $13 since I'm a sucker.

I'm fairly convinced that if it's like most of the emergency blanket materials, it will shred quickly, annoy me with crunchy sounds and the air pocket welds will likely start leaking after a while. If it's durable enough to handle me moving around, then I would be more impressed.

I like the concept of inflating it. If they made this with the new stretchy AMK Heatsheet material and had both blankets and emergency sacks that you could fill up (still useful if they deflate and holes can be repaired with DT) I think this would be an impressive item. That way the emergency sack/blanket could potentially get you off the ground and help remove conductive heat loss. Those welds would have to be tough if you laid on them though. As it is, a vest just seems like a niche product.