These cushions are contoured and slightly narrowed at the back, so they fit the armchairs in my living room perfectly (one tub chair and one accent armchair).  Both chairs are a bit firm, so they needed padding in the form of a subtle cushion.  Although it's not memory foam, it does make a noticeable and comfortable difference.  As someone else mentioned in their review, the front edge of the cushion does turn up slightly (even when no one is sitting on it).  That's because the finishing edge is along the top instead of wrapped around to the bottom.  It's not a deal breaker to me.  I did trim a little off the front of the padded insert, so it's not so tight against the cover.  That helped a bit.