Costume Wig - Synthetic Wig - Colorful Bob Wig - Mod Wig by FunnyPartyHats Wig is made of Nylon, one size fits most. This is a classic bob style mod wig. Complete your retro costume look with a neon colored mod wig. This bob wig is the perfect way to complete your Katy Perry or pop star look. Its party time! Get a little crazy tonight with this electrifying wig.