I LOVE this topper! Two years ago I purchased a 3" mem.foam topper w/ cover from a high-end store in the mall. It was comfortable, but where your body was positioned, there would be an indentation in the mattress topper and it didn't go away, so every time you climbed into bed, you'd basically roll back into the exact spot you had lain before. Needless to say, that topper is off my bed and I replaced it with Overstock''s 4.5"Grande Hotel 4.5" mem.foam/fiber mattress topper. YOU CAN"T BELIEVE HOW AWESOME & COMFORTABLE THIS IS! Your body doesn't leave indents and it springs right back to its orginal shape. ALSO, THE PRICE WAS $$$ cheaper than the other topper that didn't hold up. Oh, and I didn't have to "air" it out to get rid of any chemical-type smell. Just make sure you don't unroll it once you take off the plastic; it will unroll all by itself! THANK YOU OVERSTOCK!