Everyone here's nailing the detachable tray thing, but there's one trap nobody's mentioned yet - check what the *frame* looks like underneath. We had a chair where food would get wedged between the seat platform and the metal legs, and you literally couldn't access it without disassembling half the thing. The IKEA Antilop dodges this because the whole seat is basically just a plastic shell on simple legs with nothing in between, which is why it works so well. But if you're looking at other brands, get down low and actually inspect the underside before buying - see if there's exposed metal framing or gaps where stuff collects. A truly washable chair means the *entire* thing needs to be wipeable, not just the tray.