Non-slip rubber trunk mat for PRIUS Alpha - Model Name: PRIUS Alpha - Material: Rubber - Shape: Trunk mat - Design: Non-slip - Color: Black I used this in the previous generation Alpha. I haven't opened the zipper, but I checked and it doesn't move. This is a problem if you only want to fold down one side of the rear seats. We are looking forward to your purchase if you understand this. Thank you for looking.