IT CAME IN A RATHER SLIM BOX. IT SEEMED VACCUM SEALED. ONCE I GOT OPENED IT FLUFFED OUT IMMEDIATELY. I LET IT AIR OUT A FEW HOURS. I USED IT OVER MY MEMORY FOAM TOPPER. IT IS SUPER COMFORTABLE. I SLEPT LIKE A BABY. I DIDNT GIVE IT 5 STARS BECAUSE THE STRAPS ARE WEIRD AND WONT STAY IN PLACE.