The COBRA seat is an approved seat but we find it is not as good as the CORBAU seat, if you are wearing a helmet.
How the photo shows the seat you could not sit in wearing a helmet as the back of your helmet will hit the back of the seat and tilt you head down, very un-cumfortable. Thus the seat has to be tilted backwards and as a result if it rains it collects water making it very wet.
The Corbrau seat has more shape in the design allowing the seat to naturally sit flat and drain off. There is room for you helmet to just nessel onto the top of the seat so it does NOT tilt your head down.