The injection-molded seat mounts to an extremely sturdy bar that clamps to the seat post and steerer tube. This allows the seat to be removed quickly and easily when not in use. This is done by unscrewing a single large bolt. Also, the carrier features a padded "face pad" which 1) keeps your passenger from messing with your handlebars and controls; 2) protects your passenger from smacking his/her face on the handlebars (assuming you left the four-point harness too loose); and 3) gives your passenger a natural place to rest his/her head when sleeping. In addition, the Kangaroo's foot cups are adjustable and flexible, but I've never seen a child get his/her toes anywhere near the front wheel. - grant fox from Bookmarklet