ODI invented the original mushroom grip back in the Seventies and the concept of using thin rubber fins bending under hand pressure to create comfort, so they're best placed to update it.
The X-Trainer uses an alternating pattern of squares, each with a set of fins at 90 degrees to the adjoining ones. This gives much of the classic mushroom feel, great for riding without gloves, but with a little more wet control.
The X-Trainer is very easy to get on with in all types of weather, especially if you ride with bare hands. The fine ribbing helps create friction and allows sweat to evaporate.
Like so many lock-on grips, they come with 2.5mm Allen head bolts – these require some care to ensure you don't round out the heads.