Costumic

[…] the fact that the theatre is a polysystem, which brings together signs from a variety of systems such as (as here) the costumic, the gestural, the expressive, the aural and the verbal or linguistic — to formulate its message.

The kids' costumes thus evoke their reallife costumic counterparts, the hundreds of thousands of NYPD and NYFD t-shirts and other memorabilia sold immediately after 9/11, […]