We use Pawz when we need to protect feeties, though normally we use them in the wintertime for salt protection. They are essentially like balloons for the feet and are very thin.
Pros: a few minutes after putting them on for the first time, our dog forgot they were there. He refuses to walk in anything that resembles a shoe/boot because it's too thick/bulky.
Cons: they break after about a week of use. We apply duct tape to holes make them last longer.