Comes all rolled up but leave it to unroll by itself. It is then very easy to put on bed and put the quilted covering over it like a regular mattress cover. There was no smell at all as sometimes indicated in the reviews. Only downside is it is somewhat hot by the middle of the night-but that could be because of the cover, or me. On the whole, extremely satisfied with this product. I wish I had done this long ago. It also came very quickly-in about 5 days.