Air Rider seat cushion, similar to Air Hawk but IMHO a more superior product. It is a single cell rather than a series of pockets so feels a lot more stable and less ‘wobbly’. The other huge improvement is the 2 way valve which allows air in or out whilst you are on the move. This means you can add a bit more air without having to stop and blow more in like an Air Hawk. Also if it’s got too much you can let a little out or change it from motorway to back roads. https://www.roadraceandcustoms.co.uk/airrider/ I got the medium size and small size but will need to send one back. The medium is good for the V4 Multistrada (I would say the small is a bit too small). These are brand new, I’d tried one on my bike before I bought it (and agreed to return one). The smaller one would be good for a sports bike. https://www.roadraceandcustoms.co.uk/shop/airrider-medium/ I’m going to sell this as I don’t think I’ll need it now as I got my seat modified with memory foam and I’m happy with this. I can post photos if necessary. £70 posted.