Hazard 4 Blood Type Marker Patch

The wise front-line soldier's practice of field-marking one's blood-group on the boot-heel (typically with duct-tape and felt-marker), inspired this Hazard 4 Blood Type Marker Patch.

The 3-d injection-moulded rubber marker is far more durable than the traditional solution since it cannot be wiped off, scratched-off, or dissolved by most solvents. A more professional choice for a unit or individual operator in its appearance, it more importantly prevents misreading (imagine B+ becoming B- after some trail-wear.) The form-factor allows multiple fast-mounting methods. In keeping with the on-boot tradition, weave them into boot laces, either horizontally, vertically or diagonally (slotted holes allow for different lace-hole spacings.)

Wear them like/with dog-tags (i.d. medallions) or on a lanyard around the neck. Use paracord to make them into a bracelet. Sew them onto clothing/gear or Velcro™ backing using the perimeter trench.

Or clip them anywhere since they are sold with a durable aluminium black carabiner. They come in sets of two on one clip in a variety of subdued colours and feature a raised guilloche pattern in the background to break up mud/ice. Then can even be screwed, riveted, grommeted, or nailed onto hard surfaces such as plastic cases, wooden crates etc. to mark personal gear or paramedic's blood supply. Also, available in glow-in-the-dark.