Head holders are a type of device used to support the head and neck in a comfortable position. ALES is an acronym for Adjustable Lateral Extension Supports, which are designed to provide support for the head and neck while sitting or lying down. NECKS stands for Neck Extension Comfort Supports, which are designed to provide comfort and support for the head and neck while standing or walking. Both ALES and NECKS are designed to help reduce neck strain and improve posture.