Originally Posted by psylockolussus
I don't think they put them in costumes for no reason. I think they do include these costumes so the X-Men would like X-Men and not just normal people. They also put them on costumes so they would good on film or at least visually interesting and to appeal casual viewers. But to say that the purpose of the costumes is for protection or practicality, I'm not buying that.
I already agreed with you that they have costumes so that they'll look like superheroes. But if you can't explain the need for them, then they are ridiculous.
IN THE MOVIE, the characters are ACTING as if they are wearing them for a reason, so a reason must be created. And protection and practicality are the most logical reason.
The black leather costumes (yes, costumes) give off the sense of stealth and maybe kevlar.
The FC costumes were modified flight suits. Notice Moira was wearing a normal flight suit because she wasn't going into combat (and yes, also not a superhero).