Aly Raisman is steppin' up for causes that hit close to home on women's day -- and she's lookin' damn good doin' it.
The Team USA gymnastics star -- who took Larry Nassar to task at his sexual assault trial -- just debuted a "survivor" swimsuit by Aerie ... a women's clothing brand dedicated to body positivity.
But Aly says the super-scoop 1-piece was designed with an even greater purpose in mind -- to raise awareness for all the kids victimized by sexual abuse ... just like her and the hundreds of gymnasts who Nassar targeted.