Inflatable donut cushion: when fully inflated, the outer diameter of the donut cushion is 38 cm/ 15 inches, the inner diameter is 10 cm/ 4 inches, and the height is 9 cm/ 3.54 inches; When sitting on the inflatable cushion, the weight will be dispersed without causing stress to the body Portable and convenient: this inflatable ring cushion is easy to inflate and deflate; When not in use, just squeeze the opened valve to deflate, and then fold it to store in a bag to keep it clean and avoid damage; This cushion is lightweight and easy to carry around Suitable for: whether on a dining chair, sofa, office chair, car, train or airplane seat, you can use this inflatable donut cushion to bring you a comfortable and nice experience; You can also use it in a wheelchair and when sitting up in bed Can be adjusted: since the round cushion pillow is inflatable, you can choose the softness or firmness you want; In order to make the cushion firmer, please use a pump to add more air to it, and if you need less pressure, please deflate the cushion; This inflatable cushion will mold to the shape of your bottom, and is non-slip, which can be safely applied with most chairs What you will receive: there are 2 inflatable donut cushions with different colors in the package; Reliable materials and bright colors make these cushions easy to be loved by most people, and you can share them with your family, friends and colleagues