Principle: ergonomic principles: high-end pillow neck, low pillow for the head, neck provide good support force. ? 40 degrees elevation head curve completely consistent, effective decomposition pressure of the head and neck. ? B pillow-shaped design, fit-dimensional head and neck streamline improve circulation and promote sleep. Principle: the body's head and neck support during sleep special needs, siemyap of the U-shaped neck pillow pillow is to meet this need and design. According to the human body structure, especially on the head and neck, we design and manufacture of this unique natural latex massage pillow, it is fully in line with the human neck curve; provide appropriate support for the head and neck, cervical spine to maintain natural physical in bending state, allowing you to travel, without any exception burden rest.