... reduce grunting, muscle pain and sleep disorder, make the head, neck, waist contact without pressure, blood stream is unobstructed, can let the ... or to prevent deformation, easy, easy to insomnia stiff neck, cervical vertebra and lumbar vertebra is particularly suitable for patients ... the sleep quality, alleviate lumbar acid, low back pain, neck stiff.3)That body fully relax quickly recover energy.Note ...