Hard inserts
These are pretty good as build ups for older work boots that the old inserts are going out in.  My guy put these in (as a replacement for the old ones) then put in soft inserts over them.  He has pretty intense flare ups of his plater fasciitis every now and then and he likes these double stacked when it does happen.  This insert won't work best for everyone since it is hard not soft.  BUT if you need to have a hard surface to press on then its a great one.  It fits his 11 size boots with no issues and are comfortable for him.
Rating: 4 stars