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The improved U pillow can couple with your all life,it can parcel your head to protect you when in childhood.It can continue use the prominent part to support your neck that change it's orientation when you grow up.The prominent part is match the altitude of your side shoulder when you side sleep.
ZengCheng college of South China Normal University,LuoGang District,GuangZhou City,GuangDong Provinc
GuangZhou City,Guang, China