This is a memory foam pillow. It reduces strain on the neck and shoulders, supporting comfortable sleep. It has a recessed center and is also suitable for side sleepers. It can also be used as a lumbar pillow. While results may vary, my lower back pain improved after sleeping with it under my lower back! 【Material】Memory foam 【Color】Gray系 (Gray-toned) 【Condition】Like new It is approximately 27cm long, 60cm wide, and 5cm thick. Thank you.