This 33cm Inflatable Wobble Disc will challenge your stability in a variety of exercises. It can be used for specific training exercises or as a seat cushion to challenge your core stabilizers even while sitting at work. Strengthening your core stabilizers leads to improved posture and a reduction in injury. It comes with a hand pump so you can easily change your workout intensity in seconds. Inflate for a more firm and stable surface or deflate to increase the stability challenge. The possibilities are endless.