INFLATABLE DONUT RING CUSHION helps to relieve lower back & tailbone discomfort, prevents ulcers and discomfort from hemorrhoids or episiotomies. The inflatable design allows you to adjust the pressure GREAT FOR DAILY USE and provides comfort and support when sitting for long periods of time EASILY inflates with a bicycle pump and deflates with metal twist valve DURABLE AND EASY TO CLEAN. Made of durable, heavy-gauge natural rubber which cleans easily with a damp cloth DIMENSIONS: 15" Diameter, 3.5” Thickness, Weight Capacity: 250 lbs.