We use the best buckwheat hulls to fill the car seat covers. The flexible buckwheat hulls form a cellular structure inside the cushion. It is ventilated, breathable,can be used in four seasons and relieve hip pain and stuffiness as a result of long-time driving. They are warm in winter, cool in summer and can be close-fit to your body. Suninbox adopts all natural linen. Natural linen can breathe freely and absorb sweat. They are warm in winter, cool in summer and can be close-fit to your body. The PH value is acid. It has no stimulation to skin and meets requirements for environmental protection and human health. Using an overall horizontal line fixing 3D design, it won’t affect the use of function buttons on one side of the seat, or the use of safety belt buckle. Buckwheat Shell Car Seat Cushion Specification: Surface material: High quality linen Inner material: Buckwheat shells Package Includes: 1 Pcs X Car Seat Cushion Appropriate Season: Four Seasons General Car Model: 99% of the car models can be used Color:Gray Back Seat Size: 19.29*53.15 inches Notice: The measurement may have 0.39-1.18 inch inaccurate errors.