Specifity: 1.Absorb the impact force. When you ues it,you can feel floating in water. 2.Automatic memory deformation. The automatic shape can fix the head and solve the caused by cold or an awkwark sleeping posture.It can solve the problem of cervical spondylosis effectively. 3.Anti bacteria ransistant mites. The memory pillow can inhibit growth of mycete. 4.The memory pillow is good at moisture absorption and breathing freely. It's a nice rest pillow.