Old science fiction story, can't remember the author/title.
In the future, men and women are working side by side doing asteroid mining/operations. All the spacesuits look the same. For morale purposes, they design special suits for the women that let them choose which men can 'see' through their suits. Later on in the story they make special keys that the men can use to unlock the suits once they get back to the ships.
[remember, this story was originally written for a 1950s general audience.]