My Wife and I just love this mattress topper.  We have a new mattress but it is a little to firm and we sleep more on our sides.  This 4 inch topper fixed that problem and we have been sleeping much better.  When the product arrived the box was surprising light.  There are no straps that hold the topper in place, but we were able to take our mattress cover and fit the topper under that with it tucked in under the mattress.