Neck pillows are specially designed cushions that provide support to the neck and head, often used during travel or while resting. They help maintain proper alignment of the spine, reducing discomfort and strain on the neck muscles. Many neck pillows are made from materials like memory foam or inflatable designs, allowing for easy portability. These pillows come in various shapes and sizes, with the most common being the U-shaped design that wraps around the neck. They are popular among travelers, especially those using airplanes, cars, or trains, as they enhance comfort during long journeys.