9" ComfortCoil #708 Full Natural futon mattress, medium firm surface feel. The most comfortable innerspring futon mattress available. This is Gold Bond's best selling product. The ComfortCoil features the custom-designed supercenter innerspring unit with layers of high resiliency foam and cotton. Providing exceptional comfort and support like the best conventional mattress. With Gold Bond's own blend of cotton batting and enjoy a restful night. Mattress easily folds into any futon frame. Mattress available in various sizes and colors.