... Foam Bed Mattress,memory foam mattress,bed mattress,sponge mattress,bed pad KEYWORDS: Memory Foam Bed Mattress,memory foam ... on the head,10%on the feet and 25% on the waitst,the average pressure between body ... and bed if 5g/cm2.Therrefore,the design ... modern mattresses is to fit the body curves and support the head,shoulders,waist,hips accurately,making ...