Also called "unisex" or "androgynous" fashion, the gender-neutral aesthetic is about avoiding female/feminine markers and male/masculine markers. A person of any gender can use anything from this aesthetic without looking like they are mixing gender markers. The challenge is that some clothing is thought to be gender-neutral, and is closer to that category than anything, but would still look just a little bit out of place if it was in the men's wear section. Because Western culture to a significant degree sees male and masculine as default or unmarked, and because the rules of men's wear are arguably stricter than women's, men's wear tends to unavoidably get (mis)used as gender-neutral. Nonetheless, it is still possible to avoid some explicit masculine markers while pursuing a gender-neutral look.