I personally wouldn't use it anyway as the seats available now give so much more protection. Oskar is in the Safe n Sound Maxi Rider AHR which will take him right through until he doesn't have to be in a seat any longer. I actually intend on using it for the full amount of time he's supposed to be in a booster as it also has the harness which we still usefor him now. I feel better knowing he's safely strapped in.