Soric is a bulker/flow media that is placed within (and becomes a permanent part of) the laminate stack. It has small raised hexagons in a pattern that creates flow channels between them. The downside is that the soric (and all the resin trapped in the channels) remains within the final part. This has positive and negative effects. On the positive side it separates the skin plys and acts like a sandwich core, which increases the stiffness of the final part. On the negative side, parts will be much heavier because of all the extra resin trapped inside.
So if weight is not a factor, then soric can be a good choice. If weight is of concern, the preferred method is use of a closed-cell core with flow media outside the peel ply.
Youtube author "Matthieu Libeert" has a couple videos featuring infusions with Soric that are helpful.