● 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%. ● Knit with OEKO-TEX certified ,soft and breathable style suits every seasons.● Gel memory foam perfectly sticks with human body curve. Gel particle is not sensitive to the temperature that make you feel cool in summer and comfort in winter.● With 3cm Comfort foam in comfort layer supply high rebound,good physical stability ,good heat dissipation.