[Comfortable Sitting]The dimensions of the chair cushion are 18.1" x 14.2" x 3.2" and the dimensions of the lumbar support pillow are 13"x 4"x 13". The size meets the needs of most people, and the shape of the product is ergonomically designed to effectively relieve the discomfort caused by sitting in one place for extended periods of time. [Thoughtful Detailing]Our seat cushions and lumbar support pillows are made of high quality fabric with quality zippers. The bottom of the seat cushion has a special non-slip design and the back of the lumbar support pillow is installed with adjustable straps to fit chairs of various sizes. [Convenient to Use]The cover of the seat cushion and lumbar support pillow is removable and made of machine washable fabric for easy cleaning. The carrying handle on the seat cushion makes it easy to carry. [High-quality Materials]The core of the seat cushion and lumbar support pillow is made of high-quality foam, which is both soft and supportive and not easily dented. Soft memory foam gently conforms to your body. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.