US Patent 6981288 Structure of a pillow

A pillow includes a main support part, two secondary support parts, several mats, and a bag for housing the supports and the mats therein; the main support part is used for supporting the neck and the head of a person sleeping on the back; the secondary support parts are positioned on two sides of the main support part, used for supporting the neck and the head of a user who is sleeping on one side; a suitable number of mats are positioned under the support parts for changing the heights of the support parts according to the need of the user.