The seat cushion's square shape offers improved ergonomics thanks to enlarged sitting surface compared to round wobble cushions, and is compatible with any chair to maximise comfort at your workspace Improves blood circulation and can relieve spinal pressure by creating micro-movement to maintain balance and minimising contact between your tailbone and the chair, can support up to 150kg when placed on a chair This orthopedic seat cushion can help to reduce discomfort, fatigue and stiffness that can result from extended periods of sitting and health conditions such as sciatica The seat pad is ideal for use at home or in the office providing a fully mobile sitting solution and comes supplied with an air pump Contents: 1 x Leitz Ergo Active Wobble Cushion, Dimensions: (W x H x D): 360 x 360 x 55 mm, 1.24kg, Velvet Grey, Ergo Range