In the heat of battle it is necessary for operators to flawlessly execute one task — to identify the combatants correctly. Statutory bulletproof vests have acronym FSB printed on the back, but operators prefer these vests to others.   

Call signal patches were invented to solve this problem. This patch is placed on the back of the plate carrier, which allows to use largest possible font to write the acronym.   

These patches do not crumple, fade or tear due to the fact that they are made of polymeric materials. Used fabric in different camouflages, does not glow in the NVG.