The Comfort Tech Side Sleeper Pillow Featuring Tranquility Foam is designed for superior airflow, offering comfort, support, and enhanced durability. Featuring 37.5 Technology, which helps regulate the temperature your body experiences while you sleep. Removable cover is machine-washable for easy care.Tranquility is a registered trademark of Carpenter Co.; Comfort Tech is a trademark of Carpenter Co.; 37.5 is a registered trademark of Cocona, Inc.