The Chiroflow Waterbase pillow, which also comes in a travel size, is the only pillow clinically shown in 3 independent clinical studies to improve sleep and reduce neck pain. In fact, in a study at Johns Hopkins University, the Chiroflow pillow ranked best in all 5 categories studied over all other pillows tested. This is why we are the number 1 recommended pillow in Chiropractic today. The Chiroflow pillow augments treatment of patients with cervical pain by providing proper cervical support and improves sleep at the same time!