Memory foam mattresse s are made of memory foam as materials with the features of reducing pressure, slow spring-back effect, temperature sensitiveness, breathability, antibiosis and anti-mite effect. The mattresses can effectively reduce body pressure and become soft or hard depending on body temperature, which rectifies body shape to naturally touch and support human body. Medical science proved that the mattress can efficaciously relieve aches of skeleton and muscle, helping to cure an unsound cervical vertebra and lumbar vertebra. Besides, it will lower the frequency of snore and turning over, ensuring a deep and better sleep. Memory foam is also called slow spring-back space material born in early 1970s. It is specially developed for reducing pressure that the astronaut had to bear when the airship blast off in 1980s. After research and improvement for nearly ten years, the pressure-reducing space material has evolved into high-quality memory foam and has been applied t...