MaterialThese seat ring are made of soft and durable material (Flannel+PVC), which is free from harmful elements in rubber and completely odorless. The seat ring can bear a weight up to 100 kg. Please 20% to 60% to inflate Adjustable HardnessInflating is very easy. A pump is supplied. The hardness of the seat ring can be adjusted according to your needs. Whether you prefer hard or soft, it can meet your needs. Practical seat ring The ring-shaped cushion can evenly distribute the weight. You can use it at home, in the office and in the car, even for travel. Easy to carryThe maximum diameter of the seat ring is 35 cm. And It Can Be Folded Easily, Which Is Very Convenient For Traveling Or Traveling. Easy to CleanIt is also very easy to clean. The seat cushion can be washed in a washing machine or by hand. Please note: inflate 20% to 60% Otherwise the air will go out Ring-shaped seat cushion suitable for people with hemorrhoids, coccyx pain or after surgery Effectively relieve pain and help the affected area recover faster. Material: PVC+ Flannel, soft and durable, a perfect replacement for rubber air cushion products. Features: Good flexibility, strong bearing capacity, good ventilation, toughness and durability. Product size: 38 cm