Replacement seats for all versions of the Explorer 42. The 2017 and later Explorer 42 seat is a single seat that inserts into a sleeve like our Whitewater Series and self bailer seats. The 2016 and earlier Explorer 42 seat is a three part system with two seats for the rear person and a single seat for the front.  If you are looking for back support for the front passenger, you can pick up a backband in the Accessories & Upgrades section and attach it to the preinstalled attachments on the 2017 model or buy the kit with D-Rings for the 2016 and earlier models.