Spice up your jacket or messenger bag with a new patch! A patch is a piece of cloth or PVC created with a fabric backing and thread. The art of making embroidered patches is an old tradition and was originally handmade. Today, they are mostly produced on industrial machines and can be ironed on. So most are either printed or embroidered and can be used to patch up holes or to send a message. Patches are used to personalize or show affiliation (and possibly hide a rip or two) they can therefore also be blood type or rank as in the military - so if you need one or the other look below.