Guhdo dacron bolster, Not just any pillow can be used as a headrest when sleeping. The pillow material will affect the comfort and health of the user. It is best to use a pillow made of flexible material, which can follow the neck muscles and spine. One good material is dacron. Dacron is an excellent material to be used as the main material for making pillows. Because dacron is not only comfortable to use but also very beneficial for health.