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Hazard 4 Blood Type PVC Marker Patch (Color: OD Green / Set of 2 / O Positive)

Hazard 4 Blood Type PVC Marker Patch (Color: OD Green / Set of 2 / O Positive)
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Hazard 4


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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 exclusive blood-type plaque. The 3D injection-molded 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 miss-reading (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. Clip them anywhere since they are sold with a durable aluminum black carabiner. They come in sets of two with one clip in a variety of subdued colors, and feature a raised guilloche pattern in the background to break up mud/ice. They can even be screwed, rivetted, grommeted, or nailed onto hard surfaces such as plastic cases, wooden crates, etc. to mark personal gear or a paramedic's blood supply. Also available in glow-in-the-dark. Specify blood-type when buying.


  • Exclusive design/form-factor for multiple mounting options
  • Durable/flexible 3D injection-molded graphics are always legible
  • Snap-hook carabiner for fast clipping to gear or clothing
  • Fits most footwear with laces or pull-loops
Blood Type: O Positive
Color: OD Green
Dimensions: 2.75" L x 0.9" W x 0.1 D
Package Includes: 2x Patches, Aluminum Carabiner

Manufacturer: Hazard 4

1 Customer Review

(Write a review)

by Patrick H. on 11/27/2013
"Initially, I ordered these patches thinking that they were velcro markers I could put on my FAST helmet. When they arrived, I was surprised, but then I actually read the product description and realized "Oh, that makes sense"

Anyway, the material is durable, and just to test it out, I ran it against a belt sander for 8 seconds and there was still plenty of the rubber there, the designation was still readable.

I'm only rating it as slightly less than god because I haven't fielded the patches on my kit yet, but I have a feeling they'll hold up fine.

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This item is currently Sold Out. Most out of stock items are restocked within 1-3 weeks. Some items may take longer. Please add this item to your wishlist to keep posted on its availability.