Product Description : Square design, ergonomic design, double-hole ventilation design, nursing cervical vertebrae, ventilating drainage, prevention of hemorrhoids, help relieve sciatica, disc herniation, tailbone injury, pregnancy, hip pain and most acne sufferers Sitting. Product parameters: Name: Breathable cushion Material: polyester fiber, inner core polyurethane Size: 40 * 34 * 5-7cm Applicable people: office white-collar workers, students, pregnant women, unisex Use scene: aircraft seats, office, car seats, student seats, sofa chairs. parcel: Breathable cushion* 1 If you encounter any problems during the use, please contact us in time, we will give you a satisfactory answer in the first time.