Sami Mini Cosplay

Need advice! Sami has some friends coming to C2E2 this year and one of them, a teen boy, will be cosplaying a Mandalorian mashup. He needs to wear something underneath the armor thats either gray or white. Any ideas of something that's good quality but won't break the bank? If you have a link I would really love you! Lol! I know the internet says flight suits but they are either expensive or lack quality. (Pic for post attention 😁)

The elf is no longer on the shelf! She's been abDUCKted!!! She brought Sami this awesome duck game , Abducktion, from and the ducks sent her away and left a note saying she would be back! We can't wait to play this game with the fam!