We have a 4" topper and my 18 year old son became quite jealous. The 4" topper can be just a bit cumbersome to roll around in (beacuse you sink into it) so for my son I purchased the 3" topper instead. Bottom line is he LOVES it! I highly recommend that you also purchase a quality matress pad cover. The foam is just a bit sticky so it can be warm in the summer as well as prevent you from turning easily in bed. A good quality matrees pad takes care of this! You cannot beat the prices for the topper on Overstock and the topper is a GREAT alternative to buying a whole new matress when your existing one just needs a "boost".