The Gravity Funtube is not a normal deck tube. The elasticated seat cushions make it possible to ride the water tyre both lying down and sitting up. Simply sit on the neoprene-padded seat. This gives way and creates a comfortable recess for sitting. So you can decide whether you want to lie back and relax while riding, or whether you want to be action-packed while lying down and hurtling over the waves. The tapered shape of the tube (tube height flattens out towards the back) cushions the front section and ensures that the tube does not dip or splash water at the front. In the rear, flatter area, it is easier to get out of the water. The Quick Connect hook makes it easy to attach the towline without knots. The towing tyre is suitable for salt water, but should be rinsed with fresh water afterwards. The Funtube is supplied with a repair kit. Inflation: Do not use a compressor or compressed air to inflate the tube.