Premium Material: This inflatable cushion is made of PVC material, covered with flocking, soft and comfortable to the touch, the airtight valve ensures that the cushion stays inflated, ensuring durability and long-lasting comfort. Ergonomic Design: The donut shape of this inflatable pillow helps distribute weight evenly, reducing pressure on sensitive areas, providing maximum support and comfort to promote good posture and spinal health. Easy to Adjust: Donut seat cushion equipped with upgraded quick valve, you can use a simple air pump or blow air directly with your mouth, adjust the inflation amount at will according to your needs to get a comfortable use experience. Lightweight & Portable: This inflatable cushion measures only 45 x 39 cm (17.8 x 15.4 in), lightweight and easy to carry, and can be quickly deflated and stored in the included storage bag when not in use, greatly saving space. Multifunctional: Inflatable ring donut cushion is great for any chair, car seat, truck seat, wheel chair, plane,anywhere you need to sit comfortably, a must-have for hemorrhoid relief, lower back support, tailbone, backside, and butt pain, postpartum.