What’s the worst fashion trend you’ve ever seen? Time magazine recently asked this question of the enduringly decanal Tim Gunn, now mentoring a fresh crop of designers on the fifth season of Project Runway. Gunn’s pick of sartorial tragedies? The embrace of rubbery shoes fit for an ungulate.

Generally speaking, it’s footwear trends. I mean, today, the era of the Croc—it looks like a plastic hoof. How can you take that seriously? I know it’s comfortable; I understand that. But if you want to dress to feel as though you never got out of bed, don’t get out of bed.

Of course, this bit of wisdom sounds even better when Gunn says it. Watch Time‘s video of the interview here.