A pillow is a soft cushion designed to provide comfort and support for the head, neck, or body during sleep or relaxation. Available in various shapes, sizes, and materials, pillows play a crucial role in maintaining proper spinal alignment and ensuring a restful night’s sleep. Common pillow fillings include memory foam, latex, down, feather, and polyester fiber, each offering different levels of firmness and support. Some pillows are designed for specific sleeping positions, such as side, back, or stomach sleepers, to enhance comfort and reduce strain.