Wow, Ditto what the last review said...
Bought the twin size for my son, it arrived in a relatively small box and he got a big kick out of watching it "grow". We have only had it for a few months so can't speak for durability or longevity but it is comfortable and quiet with no spring to encourage jumping or bouncing.
Memory foam provides a great sleeping surface. In normal temperatures it is somewhat firm, but when you lay down , it starts reacting to the temperature of your body and begins to mold itself to your shape. Then, weight is evenly distributed along the surface, relieving pressure points and helping you to sleep more without tossing and turning. MATTRESS FACTS: 2" MEMORY FOAM INFUSED WITH CHARCOAL + 2" VENTILATED COOL FOAM + 4" HIGH DENSITY BASE FOAM + Rich Poly-Jacquard fabric cover . 10-Year Warranty