Medical Blood Type Patch O- (Black/Red) 1” x 1” Hook-Back

Identify your blood type at a glance with this compact medical blood type patch in O- (black/red).

• Sized 1” x 1” with hook-side backing to attach to loop panels on bags, pouches, hats, and kits.
• Suitable for everyday carry and outdoor organisation where clear ID matters.
• Always follow venue and local regulations for what you carry and display.