Tracksuit - 14 Halloween Costume Ideas
A tracksuit carries a costume with almost no extra effort, Beatrix Kiddo's iconic yellow-and-black, Player 456's Squid Game green, Vector's simple orange zip-up. One bold color and the right cut does most of the identifying work.
Fit matters here more than people expect, a baggy modern tracksuit reads differently than a fitted retro one. Check whether the character's version is loose or slim before you buy.
Not at all, several of the most recognized costumes on this site are built entirely around one. Comfort and recognition go together here.
For most of these, yes, the color is doing the primary identification work, get it close.
A solid-color zip-up set in the right shade. Add one prop if the character has a signature accessory.