Rowan, I'm pretty certain it's a regular seat post, what looks like the suspension part appears to be the big Velcro part of his seat post bag. I guess he just like those nose less seats, it must be weird not to be able to correct with your inner leg on the nose of a seat. But if it works for him, what the heck. Yes though, a fat bike must be very cushy. I've yet to try one.