If that's the case then they do indeed have "mag heels" since Miranda and Samara wear heels at all times. (possibly Liara and Ashley too but I don't remember)
Point taken, but considering that even on a regular civilian airplanes passangers are either restricted or just highly recommended not to wear high heels (and no crew is allowed to), I still doubt that spaceship (especially - military one) is any different about this matter. As for Miranda and Samara...sigh..hate to say that, but remember about artist integrity, right? Or we may just consider that those two are that cool, so that they don't care about gravity.

Liara had flat white boots afair. And I did not have Ash in my ME3.
The clothes worn on the ship aren't battle-dress. You don't see mshep charging into battle in a puffy sleeveless lumberjack vest.
No one was talking about charging into battles, but different things may happen aboard (like collector's attack) and crew must act asap then, and I don't see heels may help with it. I know one may run on high heels (I had to, several times). But I doubt anyone would object that they don't make running (especially - on rough terrain and\\or ladders or any kind of grids on the floor) easyer.
As I see it - uniform must never affect crew's efficiency. And from that point I think ME1 uniform is way better then ME3 one with all those wierd buttons, straps, metal thingies etc.
There is no reason why manshep should be able to wear whatever he wants including pjs (hoodie), very unprofessional lumberjack outfit, and t-shirt/jeans/leather jacket yet femshep has to wear exactly the same thing as him or little kid overalls.[...]
I don't dress like a man or act like a man and I don't want my femsheps to be FORCED to do so.
And that's the other part of the story. Is it any surprize that femshem was always far from front character in ME series? Have you ever seen ME1\\2 femshep trailers or posters?.. No woman-like animations, sharing clothes with bro... God, she does not even have same "default" face through the series, when bro is "canonized" and real-face based... Sad truth, I know, but there is little things to do about it (especially now, when they finished series). They may still make some cheap (but not free, I guess) DLC clothes packs, but that would not fix the entire problem.
ps: but who knows, probably, N7 training includes high heels races, or even high heels parachuting or diving.. spec forces, hell, yeah! 8P