Converta-Fit™ wrap skirt on this mattress pad provides a guaranteed fit on all mattress types-conventional, high profile and waterbeds. The quilted sides offer added comfort and extra side protection. Polyester cotton blend with quilted sides and spandex front and rear construction holds pad firmly to standard and extra thick mattresses allowing proper sheet fit. Pads filled with 3.75 oz. per square yard of bonded polyester filling. Non Allergenic. Machine washable. Restful Nights® Extra Ordinaire™ Mattress Pad.