I don't see the Singer black biker outfit look in this myself. It has much more of a 1960s retro-futuristic design aesthetic. Actually when I first saw the suit I thought it looked clunky and outdated. It was only after reading the movie synopsis that it made sense. As well as seeing the more modern YJ suit. The original Ant Man suit was likely created back in the 1960s, so it would have those design cues. It looks like something that would have been on the cover of Popular Science back then maybe with the headline "Is a Shrinking Man Suit Possible?" Now it kind of reminds me of the Silver Diner, and I don't mean that in a disparaging way.
That's actually a great point. I see what you mean.