This pillow from Eli & Elm is specifically intended to keep the backbone within an ergonomic position when you're sleeping on the side. It's a U-shaped cutout that provides space on your shoulder which is crammed with supportive shredded latex and plush polyfiber that conforms to your head and neck. https://elliottijhfd.tokka-blog.com/28439270/the-5-second-trick-for-zen-bloks