I will not leave the house without my Arctic Shield boot blankets. They make a little noise from the crinkling when putting them on, but after that they are quiet enough for me.
I have never worn a pair of boots with more than 500 grams of insulation since buying these boot blankets and I hunt NW Indiana.
Seriously though, they are cheap, weigh next to nothing, and work for me. That being said, my feet always seem colder in any kind of rubber boots so I don't wear them unless I have to wade water to get to my stand. And if you need more warmth...just drop a warmer in there.