Want to sleep better and improve your performance the next day? This BRAIN SLEEP pillow can help! • Adopts a patented 3-layer, 9-level progressive design that can adjust to the most suitable height based on your head shape and sleeping posture, helping you quickly enter deep sleep. • Unique cool-touch design effectively lowers brain temperature, allowing you to fall asleep faster and sleep more soundly. • The pillow can be rinsed with water, keeping it clean and hygienic, which is very convenient. • If the size is not suitable, you can exchange it for free once within 30 days of purchase! This pillow is the flagship product of Japan's Brain Sleep company. Many users say their sleep quality has significantly improved after using it, and they feel much more energetic in the morning! Don't miss out on experiencing true deep sleep! Please consider before buying, if you are particular about product condition.