Our grandson did need a bit of a learning time to not pull these off (started wearing them when he was 9 mos for a trip to CA and then trip to south FL). You do have to take care to adjust them so that they are comfortable each time. Very good quality glasses AND case. They adjust so I can tell he should be able to get multiple years of use out of them if they are taken care of. My daughter always stores them in the pouch. Remember to clean them occasionally. And the baby looks like such a cool dude!