Bed is not truly 4” thick as described.  The cones of the foam crush down to a 1” thickness. I thought it was to be orthopaedic foam but is actually just the egg crate foam and since it is very long and skinny ‘cones’ they just flatten out andor break off the tops.  Gave it two stars for the cover which is heavy canvas like fabric, though not being washable might be a problem as not all messes made by a 90 pound dog can be just wiped away with a damp cloth.   Also had to put something underneath as there is no anti skid measures and every time dog gets up she would push off and it would slide on the hardwood floor. Would I recommend- no - you can get a better foam for the money.