The NKA Morale Patch from Maxpedition isn't just for decoration. NKA stands for No Known Allergies, alerting medical responders towards appropriate methods of treatment if you are injured and unable to respond. The patch is made from ruggedized PVC rubber, making it highly durable and ensuring lettering remains bold and readable at all times. Its hook-back attaches to any loop surface, including those found on many tactical and outdoor bags. It also comes with an additional loop sheet that can be sewn onto uniforms or gear, providing a location for custom placement.