A car waist pillow is a type of cushion or pillow that is designed to be used in a car seat to provide additional support and comfort to the lower back and waist region. These pillows are often made of foam or other materials that are designed to contour to the shape of the body and provide support while driving or sitting in a car for extended periods of time.

Car waist pillows are often used by drivers who experience discomfort or back pain while driving, or by people who spend long periods of time in a car and want to improve their sitting posture. They can be used in the driver's seat or in the back seat, and can be adjusted to fit different body sizes and shapes.

There are many different types of car waist pillows available, ranging from simple foam cushions to more complex designs with features such as memory foam, lumbar support, and adjustable straps. Some car waist pillows are also designed to be used in other types of seating, such as office chairs or airplanes.

Overall, car waist pillows can be a useful accessory for anyone who spends a lot of time driving or sitting in a car, and can help to improve comfort and reduce the risk of back pain or discomfort.