Comfortable support cushion: The cylinder roll provides support for your head, neck, or waist while you work at a desk, sit on the sofa, watch TV, or read. It is designed to support the neck, back, knees, and other joints whether you are lying flat or sitting. Sofa and bed gap filler: This bed rest pillow spans end-to-end along a king-size mattress to cover the head, foot, or side. It helps prevent pillows, pets, and other items from slipping behind, underneath, or out of bed. It can also function as a soft, elongated foam pillow for other bed sizes when placed against the wall. Soft, comfortable round neck roll: Made from waterproof fabric and ultra-soft foam for long-lasting comfort. The design resists flattening over time, keeping its shape and support. Ergonomic design for natural alignment: Round foam pillow promotes proper alignment, maximum support, and gentle comfort. It helps encourage good sleep posture and can reduce head, shoulder, neck, lumbar, and back discomfort. Use scenarios: - At a desk or on the sofa: support your head, neck, and upper back during work, TV viewing, or reading. - In bed: fill the end-to-end area of a king-size mattress to keep pillows, pets, and items from slipping behind or under the bed. - Lounging or sleeping: use as a neck roll to maintain natural alignment and reduce strain while resting.