Our MOLON LABE Tactical Patches are 100% embroidered with velcro hook backing and can be added to any of your gear with velcro loop. The 1"x3 3/4" size is specifically designed for use with tactical caps. MOLON LABE was the Greek phrase used centuries ago in battle. The defiant response MOLON LABE of King Leonidas I of Sparta to Xerxes I of Persia, when asked to surrender when outmanned at the onset of the Battle of Thermopylae (480 BC).