Abstract: The expandable pillow system has a top-end head pillow and two side pillows interconnected by elastic fabric which fabric adjustably vertically spaces apart the head from the sides and adjustably horizontally spaces apart the sides causing the left-right sides to adjust adjacent either the user's back or side, thereby forming vertical arm channels and a horizontal body channel. System sold with or without insertable pillows and also operable with 1,2 hemispherical side pillows. Enhancements include side pillow cases with closable seams converting interior pillow cases a substantially cylindrical interior space to a substantially hemispherical interior space.