We drive with the jeep doors off, these give me more peace of mind for my kids. Now that I'm the only one who can un-buckle them, I'm not worried about something jostling into the seatbelt release button. Very sturdy plastic. Cool that they're made in the USA.The one improvement I have to offer is to include something to hold it in place when they're not in use. I rigged something up with hair ties, but it'd be nice if it came that way. Awesome product, would recommend!See full review