A 3D printed patch with the GROM unit insignia on it. for context, this is the summary of what GROM is: 

GROM Military Unit (JW 2305) is a special forces unit of the Polish Armed Forces within the Polish Special Forces. The unit was officially formed on 13 July 1990 and honours the traditions of the World War II Silent Unseen paratroopers.

I didn't really have anything in mind when I drew this up, but I guess you could use it for cosplay or something...