I have tried a couple different types that I like. The first kind is from Pawz and can be found on Amazon. The size XL is sufficient for my 2 Danes and German Shepherd. We use them for potty breaks since they are waterproof/mud proof, and you can extend the life by patching up holes with duct tape.

I also like the brand Ultra Paws and they can also be found on Amazon. I have them in a size large and they fit all my dogs, though they are a tad tight on my largest Dane's front paws.