On our newer pads, we added a zipper to the backrest to allow for removal and installation of the backrest. This helps us keep our shipping costs down, so we can pass our savings to our customer. It also has the added benefit of being able to customize and modify the feel of your backrest!
Your pad will show up with a folded backrest, like below.
Unfold the backrest and unfold the pad.
Slide the backrest into the zipper opening.
Once the backrest is fully inserted, zip the pad closed and you are ready to install your new pad!