The vault dweller survivors in Fallout 4 wear blue jumpsuits with yellow embellishments, and cosplayer Danielle, also known as busanpanda, replicated the outfit. She also has a Pip-Boy and a Fat Man, and the shooting location is decorated with aged and weathered posters, as well as some supplies. The extras really add to the environment.
Danielle said on Reddit that it didn’t long at all for her to complete the costume:
I sew a lot, so costumes usually don’t take very long to make anymore. My vault suit took two days to make. I made a second vault suit for my husband and he made my weapon and one for himself (Fat Man and a laser rifle.) My sewing skills are actually pretty normal among cosplayers where I live. I have a few friends who can whip up an entire costume, complete with armor and weapons, in a single day. Hopefully one day, with more space, I can do the same.
She said she heavily modified the Kwiksew 3052 pattern for the jumpsuit.