So happy with the Gel 3" Memory Foam Mattress Topper.  I have had other mattress toppers, and they do not compare to this one.  The fabric is so nice and soft on the top side, and the underside is different and prevents the topper from slipping.  There are also straps that help keep the topper in place once you put them around the box spring.  The actual thickness is very comfortable and I look forward to a good night's sleep.  One thing that was not clear - the on-line description states that the cover is machine washable, however, the tag on the actual topper says to "spot clean" only. I took a chance and machine washed the outer cover, and it laundered up perfectly.  No shrinkage or damage.