There are many examples of cases where t-shirts or hats are given out to a group of people consisting of men and women. Since they are worn by women, are these, and any other unisex clothes like this, considered beged ishah?
The Shulchan Aruch (YD 182:5) lists examples of things that constitute beged isha and then qualifies "in a place where where no one wears such clothing and adorns with such adornments except women."
That is, a beged is only beged isha if it is exclusively so. Therefore, by definition, unisex clothing is not beged isha.