All mattress pads are not created equally. The Natura Cotton-Filled Mattress Pad proves this with features like an unbleached 100% cotton percale cover and 18 oz/yd^2 unbleached cotton fill. The Natura also sets itself apart by quilting the cotton fill to the cover thus eliminating the shifting, clumping and hollow spots that are so prevalent in other mattress pads. The cotton fill is naturally breathable and this pad can be machine washed and dried.