VooDoo Tactical 20-9726007000 Blood Type Tag - O Pos O Positive/Brown Letters, Coyote Webbing;

This is a great idea for anyone going into harms way. Our troops use Tags like these so the medics and DOCS know their blood type at a glance. Equipped with both Velcro and a metal snap hook, these Tags can go anywhere you go. Clip them to a vest, jacket or pants, and carry it on and off duty. It just might save your life someday! they come in three color options and 8 blood type options.