PILLOW-TOP POCKET COIL MATTRESS (SINGLE-SIDED USAGE) ●3 zones spinal-protecting system conforms to the demand of global markets. According to the human body mechanics,head part creates 10% of body force at sleeping posture,back-hip with 75%.and legs with 15%. To fit those force diversity,2.0mm coils are used for head and leg zones,and 2.2mm coils are right for the middle.●3cm convoluted foam in quilting plays a role of sound insulation,sould absorption and shock absorption.● With 4cm premium foam in pillow top supply a certain of comfort.● OKEO-TEX Certified knit fabric with soft and breathable features,provide a health sleeping environment.