1★Vacuum-sealed for freshness, our mattress topper is easy to fluff up and restore to its normal thickness. Leave it in the sun for a few hours for best results. 2★ Our deep pocket design with 360° fabric sides stretches easily and fits mattresses up to 21" thick, ensuring a snug and secure fit all night long. 3★ We're so confident in the quality of our mattress topper that we offer a 365-night satisfaction guarantee. If you're not completely satisfied, simply contact us for a full refund.