I absolutely love my 4" topper.  It arrived rolled up and "squished" for shipping.  I unwrapped it and set it on my bed and it gradually filled with air and a couple of hours later, you couldn't even tell that it had been packaged so tightly! No creases or wrinkles noted. There was no "new" odor at all. When I went to make the bed, my mattress pad and sheets fit it with no problem whatsoever. Now the best part - the bed was so comfortable I slept like a log - and my little dog did, too! I absolutely recommend this product for a nice, soft, comfortable mattress topper!