For comparison check out the complete series in the Web Gallery.
He’s wearing the booties from Jazmyn in Wyoming (thanks!) along with the Suessian Sweater, the origins of which I cannot remember. Oh, and pants with pockets on the outside. By outside I mean a flapping pocket sewed on the outside of the pants, no hole in the pants at all. I suspect that the designer realized the strangeness of having pockets on baby clothing and made it such that a few minutes with a seam remover would render the pants pocketless.