● Functional fabric contains silver fiber, antibacterial, anti-static, avoiding odor generation, washable.● 3 zones spinal-protecting system conforms to the comfort demand . According to the human body mechanics,head part creates 10% of body force at sleeping posture,back-hip with 75%.and legs with 15%. ● With 2cm graphene foam in comfort layer supply stability, conductivity, thermal conductivity  to ensure you are comfortable all night long● With 5cm high rebound foam in comfort layer supply high rebound,good physical stability ,good heat dissipation.