This pillow adjusts your neck and shoulders into one line, fixing the posture. The Misiki cervical pillow provides comfortable support while you sleep since it is composed of high-quality memory foam that is moderately firm. The neck pillow aids in maintaining a healthy sleeping position to ease shoulder and neck strain. The sleeping pillow has a temperature detecting feature that adjusts it to properly accommodate your neck. CertiPUR-US certified materials make the pillow safe for use without fear of allergies. This contour memory foam pillow from Coop Home Goods is designed to provide comfortable support and relieve neck pain, headaches, snoring, and TMJ syndrome. It is composed of shredded bamboo-derived viscose rayon that is adjustable so you can personalize your sleeping experience. Technical Features: 1. High-density slow rebound memory foam 2. CertiPUR-US certified materials 3. 24.5 x 14 x 4.5 inches size. PROS Great for back sleep Firm enough CONS Side sleeping isn't the best.