<br> <br> <br> <br> The seat unit should come with a backrest and seat that are anatomically contoured. It is essential that the seat is a great fit. Too narrow and it may develop pressure points and be uneasy. Too big and it will not effectively support the rider. It ought to however be wide enough so that heavier outdoor clothing can be worn easily.<br> <br> <br> <br> <br> <br> <br> <br>