The Tri-Core Water Pillow Adjustable Cervical Support is an adjustable water-based pillow for side sleepers or back sleepers that combines the comfort of water with the support of fiber. Do you have problems staying asleep, tossing and turning, or flipping your pillow over throughout the night? Get better sleep each night by gently cradling your head and neck with the Tri-Core Water Pillow's adjustable water chamber that is surrounded by soft, polyester fiber fill. This pillow is ideal for side sleepers, back sleepers, and people who suffer from chronic headaches and neck pain. When filled, the water pouch instantly responds and adjusts to changes in sleeping position and head movement, helping improve sleep quality. The water chamber is removable to make filling it convenient and easy. The recessed, threaded fill port with screw-on cap prevents leakage so you can rest assured, knowing your pillow will be dry in the morning. For convenient laundering, simply remove the water pouch and toss the pillow into washing machine. Easy-to-follow instructions can be found on the pillow's tag. This unique Tri-Core water chamber has an oval shaped center which displaces the water to cradle the head and support the neck in a more natural position. It reduces water movement and sloshing sounds. It also reduces strain on the neck by preventing the water chamber from bulging or doming when filled. Creating a ring of support that instantly responds to movement. When you are about to use it, simply add water to reach desired level of support as noted on the pre-marked water chamber: soft, medium, firm, x-firm. The Tri-Core Water pillow is made in USA to the highest quality standards and is latex free.