The Cumulus® Top Cover uses wash-activated patterning woven with the cutting edge and patented Centium Core Technology®. A polyester/cotton blend ensures lasting performance and optimal softness. Centium Core Technology® from Standard Textile makes the top cover last longer and increases the performance of this textile. The lowered product weight means significantly less drying time and helps save energy. This cover does not need to be ironed and non ironing is recommended.