The Denver mattress features 800 Pocket springs to offer excellent comfort and support. The pocket springs ensure minimal roll together and comfort is enhanced with Myerpaedic firm support layers for the ultimate back care. The mattress is tufted so all the fillings are held together securely. It has unique firmer outer springs on the sides to prevent you from rolling out of bed, this also gives you full use of the entire mattress surface. It is a turnable mattress measuring 26.5 cm in depth with a firm feel. A great value mattress.