An adjustable waterbase pillow for side sleepers or back sleepers that combines the comfort of water with the support of fiber. This truly versatile pillow carries a 4 year warranty! 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 chamber 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 chamber and toss the pillow into washing machine. Easy-to-follow instructions can be found on the pillow's tag.