All Royal-Pedic mattress pads custom made to exactly fit your needs.After placing your order, allow 1-2 weeks for the mattress to be shipped to you. The pillowtop pads provide extra cushioning, luxurious comfort, and additional pressure point relief to hips and shoulders for the ultimate in rest and relaxation. The pillowtop pad lays right on top of the mattress. Then the mattress pad and fitted sheet go over both the pillowtop pad and the mattress itself holding the pad in place. In addition, the pillowtop pads quite substantial in weight, and the mattress and pillowtop pad coverings cotton on cotton, rather than a slippery polyester fabric. The pillowtop pad will not slip around. All Royal Pedic Pillowtop Pads crafted with untreated New Zealand lamb's wool, hypoallergenic Comfort Fil 7, and a layer of natural latex encased in 100% Belgian cotton fabric covering.