...but obviously it's better to know what you're dealing with before you have to use them. If they're as good as I hear it will be money well spent. I have the Bivy style set up as a subscription on Amazon.com- every month they'll send me one and I get a discount and free shipping. This way they end up costing only $12 each, quite a savings. Well worth it if they actually save your life someday!
For sure. It's like the old motorcycle joke:
Q: How much should I spend on a motorcycle helmet?
A: I dunno. How much is your head worth?