Are sling back shoes out of fashion? Not the stiletto sling back shoes but sling back with heels of about 1 1/2 inches.
My opinion, I think slingback kitten heel shoes look very dated. When I see slingbacks, which is rare, it's on older or no fashionable ladies. High heel slingbacks are okay, but not lower heel.
Also, for slingbacks, you have to have super nice soft heels as the heel of your foot is where the eye will be drawn to. Any dry heels and it looks awful, so be sure to scrub and moisturize if you decide to get a pair.