Is it okay to wear a sports bra in public ie: gym, jogging etc?

[Love22]

i wear a sports bra when working out..normally if i go to the gym i throw a tanktop over it but.... i have a really cute picture i took of myself that i want to post online (its not slutty lol and i'm 23 by the way... so is it okay to show online or is a sports bra only be worn UNDER clothing and not by itself?. and is it considered tacky or slutty or inappropriate to wear a sports bra and the champion athletic shorts (you know the cute ones that you roll over once but are super comfortable.. while jogging or at the gym or in public? i havent yet because well i dont know the proper "work out clothes etiquette" and im curious..