An expandable protective covering for a seatbelt including a substantially rectangular seatbelt cover having an expandable middle portion disposed between a pair of end portions. A slot is continuously disposed within the seatbelt cover from a left side of a left end of the pair of end portions to a right side of a right end of the pair of end portions. Each of a pair of locking mechanisms has a locking button disposed on a front surface of each of the right end and the left end, respectively, and a release opening disposed on the back surface of each of the right end and the left end, respectively. A seatbelt is configured to be slidably disposed within the slot. The locking button is both depressable into the release opening and releasable out of the release opening in order to selectively secure and release the seatbelt from within the slot.