How many times have you been driven from your favorite outdoor pursuit by the relentless attack of the biting deerfly? This unique patch placed onto the back of your cap will stop the deerfly cold. Deerflies like to fly around the head of their target. The Tred Not patch takes advantage of this behavior by trapping the deerfly when they land on the back of your head to bite. Patch is a 2" x 6" long cloth tape that easily adheres to all types of hat or cap materials and is easily removed without leaving any residue. Tred Not patches offer a safe and simple solution to an age old problem.