What's a Trench cover you ask? This is great for Unlimited owners who hate losing things down that bottomless pit between the rear seat and back cargo when the seats are down. This is perfect for dog owners, campers who sleep in the back after a day of wheeling or anyone who doesn't like the unfinished look when the seats are down. These require no special tools to install and are made using the matching carpet. They flip up and down when the seat are moved up and down.