6×6 post foundation question – GreenBuildingAdvisor

I am planning to build a small workshop in central Virginia and I am considering pole-barn style construction using PT 6x6s. A local lumberyard sells a product called “Green Post” which has the bottom 48″ of the 6×6 encased in a layer of bitumen and polyethylene to keep the preservatives from leaching out and prevent it from rotting.

I would like to use as little concrete as possible, but I am wary of burying wood in the ground. Does anyone have any experience with this sort of product and know if it is significantly better than an unwrapped PT 6×6?

Product website is: https://www.planetsaverind.com/pdfs/greenpost_buildings_2pg_Generic_818.pdf