YYGIFT Set of 2 Soft Polyester Cotton Car Neck Pillow Car Headrest Neck Support Pillow (0004-1) Internal filler: polyester cotton. These pillow will comfortably support your head and neck.Make your driving life more comfortable. Its compact design makes it convenient to be taken everywhere. It is mainly designed to provide you support for your head and neck. Strap it to the headrest of your car, or on the back of your chair at work,provide your neck much comfort.