Please do yourself a favor. Go get your PSK, take out your "survival" blanket (I know you have one. Don't you??).

Go out in your back/front yard (front yard if you don't mind raising all kinds of suspicions in your neighbors). Unfold your blanket, now try to wrap up in it.

Now put a little teeny tear somewhere in it, and try it again.

Excellent experiment, right?

Oh, my neighbor said "Is that your Superman outfit for Halloween?"

Smart axe.