When I'm on concrete I don't use any jack pads - the jacks aren't going to sink into the concrete. I may or may not use them on pavement. It will depend on how hot it is and if the pavement looks thin meaning I can see where others have been denting it.
I made mine out of treated plywood. They're probably a little more substantial (heavier) than some people would want, but they'll last as long as the MH does.
I bought a sheet of 4' x 8' x 3/4" treated plywood. Cut that into 18 pieces 16" x 16". The make four pads, two of them 5 layers thick and two of them 4 layers thick. Use Titebond III waterproof glue or Gorilla glue between all of the layers and then use 5 2.5" stainless screws from each side of the completed pad to compress the glue tightly while drying. I also gave them several coats of Thompson's waterseal.
On one edge install a large stainless eye bolt. Then in the end of wooden whindshield squeege handle, I installed a stainless hook. With it I can position the pads easier under the jacks and it's very easy to hook them and pull them out from under the MH.
They'll last for ever and at 16" x 16" they prevent the jacks from sinking into soft ground. And having the pads two different thicknesses helps to offset some unevenness in the ground levels.
Bill