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Hazard 4 A- Blood Type Marker Up to 50% Off — 22 models

Hazard 4 O- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-O-NEG-GRN
Hazard 4 O- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-O-NEG-CYT
Hazard 4 O- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-O-NEG-YLO
Hazard 4 O+ Blood Type Marker, 2 Pack, Black, PAT-BLD-O-POS-BLK
Hazard 4 B+ Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-B-POS-YLO
Hazard 4 B+ Blood Type Marker, 2 Pack, OD Green, PAT-BLD-B-POS-GRN
Hazard 4 O+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-O-POS-CYT
Hazard 4 B+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-B-POS-CYT
Hazard 4 B- Blood Type Marker, 2 Pack, Black, PAT-BLD-B-NEG-BLK
Hazard 4 B- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-B-NEG-YLO
Hazard 4 B- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-B-NEG-GRN
Hazard 4 B- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-B-NEG-CYT
Hazard 4 AB+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-AB-POS-CYT
Hazard 4 AB- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-AB-NEG-YLO
Hazard 4 AB- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-AB-NEG-GRN
Hazard 4 AB- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-AB-NEG-CYT
Hazard 4 A+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-A-POS-CYT
Hazard 4 A+ Blood Type Marker, 2 Pack, Black, PAT-BLD-A-POS-BLK
Hazard 4 A- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-A-NEG-YLO
Hazard 4 A- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-A-NEG-GRN
Hazard 4 A- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-A-NEG-CYT
Hazard 4 AB+ Blood Type Marker, 2 Pack, OD Green, PAT-BLD-AB-POS-GRN
Hazard 4 O- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-O-NEG-GRN
1 of 22 images
Hazard 4 O- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-O-NEG-GRN
Hazard 4 O- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-O-NEG-CYT
2 of 22 images
Hazard 4 O- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-O-NEG-CYT
Hazard 4 O- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-O-NEG-YLO
3 of 22 images
Hazard 4 O- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-O-NEG-YLO
Hazard 4 O+ Blood Type Marker, 2 Pack, Black, PAT-BLD-O-POS-BLK
4 of 22 images
Hazard 4 O+ Blood Type Marker, 2 Pack, Black, PAT-BLD-O-POS-BLK
Hazard 4 B+ Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-B-POS-YLO
5 of 22 images
Hazard 4 B+ Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-B-POS-YLO
Hazard 4 B+ Blood Type Marker, 2 Pack, OD Green, PAT-BLD-B-POS-GRN
6 of 22 images
Hazard 4 B+ Blood Type Marker, 2 Pack, OD Green, PAT-BLD-B-POS-GRN
Hazard 4 O+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-O-POS-CYT
7 of 22 images
Hazard 4 O+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-O-POS-CYT
Hazard 4 B+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-B-POS-CYT
8 of 22 images
Hazard 4 B+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-B-POS-CYT
Hazard 4 B- Blood Type Marker, 2 Pack, Black, PAT-BLD-B-NEG-BLK
9 of 22 images
Hazard 4 B- Blood Type Marker, 2 Pack, Black, PAT-BLD-B-NEG-BLK
Hazard 4 B- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-B-NEG-YLO
10 of 22 images
Hazard 4 B- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-B-NEG-YLO
Hazard 4 B- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-B-NEG-GRN
11 of 22 images
Hazard 4 B- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-B-NEG-GRN
Hazard 4 B- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-B-NEG-CYT
12 of 22 images
Hazard 4 B- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-B-NEG-CYT
Hazard 4 AB+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-AB-POS-CYT
13 of 22 images
Hazard 4 AB+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-AB-POS-CYT
Hazard 4 AB- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-AB-NEG-YLO
14 of 22 images
Hazard 4 AB- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-AB-NEG-YLO
Hazard 4 AB- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-AB-NEG-GRN
15 of 22 images
Hazard 4 AB- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-AB-NEG-GRN
Hazard 4 AB- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-AB-NEG-CYT
16 of 22 images
Hazard 4 AB- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-AB-NEG-CYT
Hazard 4 A+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-A-POS-CYT
17 of 22 images
Hazard 4 A+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-A-POS-CYT
Hazard 4 A+ Blood Type Marker, 2 Pack, Black, PAT-BLD-A-POS-BLK
18 of 22 images
Hazard 4 A+ Blood Type Marker, 2 Pack, Black, PAT-BLD-A-POS-BLK
Hazard 4 A- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-A-NEG-YLO
19 of 22 images
Hazard 4 A- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-A-NEG-YLO
Hazard 4 A- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-A-NEG-GRN
20 of 22 images
Hazard 4 A- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-A-NEG-GRN
Hazard 4 A- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-A-NEG-CYT
21 of 22 images
Hazard 4 A- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-A-NEG-CYT
Hazard 4 AB+ Blood Type Marker, 2 Pack, OD Green, PAT-BLD-AB-POS-GRN
22 of 22 images
Hazard 4 AB+ Blood Type Marker, 2 Pack, OD Green, PAT-BLD-AB-POS-GRN

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Questions & Answers
Do you have the same item in A positive Expert Answer

The MPN:PAT-BLD-A-POS-BLK is for A+.

by Kurt Colbourne, Gear Expert, October 7, 2021
View All Q&A You Have a Question? Ask!
Customer Reviews
Most Recent Reviews
Great Product by Robert, Verified Owner, January 4, 2025
Only disappointment is that they only carry Black A+, truly wanted OD GREEN but had to settle.
Read 1 Review
22 Models Available
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Product Info for Hazard 4 A- Blood Type Marker

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 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 mis-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 perimiter trench. Or 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.image

Specifications for Hazard 4 A- Blood Type Marker:

Manufacturer: Hazard 4
Weight: 1 oz
Fabric/Material: Rubber
Quantity: 2
Length: 0.9 in, 25 mm
Application: Around Town, Tactical, Work, Duty
Footwear Type: Boots
Height: 70 mm, 2.75 in
Size: One Size
Age Group: Adults
Width: 0.1 in
Seasonal/Temperature Use: All Seasons
Design/Pattern: Simi Valley
Gender: Unisex

Features of Hazard 4 Blood Type Marker

  • Exclusive design/form-factor for multiple mounting options
  • Durable/flexible 3D injection-moulded graphics are always legible
  • Snap-hook carabiner for fast clipping to gear or clothing
  • Fits most footwear with laces or pull-loops

Package Contents:

  • Hazard 4 A- Blood Type Marker

Hazard 4 A- Blood Type Marker Orderable Models

List of Orderable Models

  • Hazard 4 A+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-A-POS-CYT , MPN: PAT-BLD-A-POS-CYT , UPC: 816211010437 , Code: 4HZ-FAA-BLOODA-PAT-BLD-A-POS-CYT
  • Hazard 4 AB- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-AB-NEG-GRN , MPN: PAT-BLD-AB-NEG-GRN , UPC: 816211010499 , Code: 4HZ-FAA-BLOODA-PAT-BLD-AB-NEG-GRN
  • Hazard 4 O- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-O-NEG-GRN , MPN: PAT-BLD-O-NEG-GRN , UPC: 816211010659 , Code: 4HZ-FAA-BLOODA-PAT-BLD-O-NEG-GRN
  • Hazard 4 B- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-B-NEG-GRN , MPN: PAT-BLD-B-NEG-GRN , UPC: 816211010574 , Code: 4HZ-FAA-BLOODA-PAT-BLD-B-NEG-GRN
  • Hazard 4 A- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-A-NEG-CYT , MPN: PAT-BLD-A-NEG-CYT , UPC: 816211010390 , Code: 4HZ-FAA-BLOODA-PAT-BLD-A-NEG-CYT
  • Hazard 4 O- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-O-NEG-CYT , MPN: PAT-BLD-O-NEG-CYT , UPC: 816211010635 , Code: 4HZ-FAA-BLOODA-PAT-BLD-O-NEG-CYT
  • Hazard 4 B+ Blood Type Marker, 2 Pack, OD Green, PAT-BLD-B-POS-GRN , MPN: PAT-BLD-B-POS-GRN , UPC: 816211010611 , Code: 4HZ-FAA-BLOODA-PAT-BLD-B-POS-GRN
  • Hazard 4 B+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-B-POS-CYT , MPN: PAT-BLD-B-POS-CYT , UPC: 816211010598 , Code: 4HZ-FAA-BLOODA-PAT-BLD-B-POS-CYT
  • Hazard 4 A- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-A-NEG-YLO , MPN: PAT-BLD-A-NEG-YLO , UPC: 816211010406 , Code: 4HZ-FAA-BLOODA-PAT-BLD-A-NEG-YLO
  • Hazard 4 O- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-O-NEG-YLO , MPN: PAT-BLD-O-NEG-YLO , UPC: 816211010642 , Code: 4HZ-FAA-BLOODA-PAT-BLD-O-NEG-YLO
  • Hazard 4 AB- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-AB-NEG-YLO , MPN: PAT-BLD-AB-NEG-YLO , UPC: 816211010482 , Code: 4HZ-FAA-BLOODA-PAT-BLD-AB-NEG-YLO
  • Hazard 4 A+ Blood Type Marker, 2 Pack, Black, PAT-BLD-A-POS-BLK , MPN: PAT-BLD-A-POS-BLK , UPC: 816211010420 , Code: 4HZ-FAA-BLOODA-PAT-BLD-A-POS-BLK
  • Hazard 4 O+ Blood Type Marker, 2 Pack, Black, PAT-BLD-O-POS-BLK , MPN: PAT-BLD-O-POS-BLK , UPC: 816211010666 , Code: 4HZ-FAA-BLOODA-PAT-BLD-O-POS-BLK
  • Hazard 4 B+ Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-B-POS-YLO , MPN: PAT-BLD-B-POS-YLO , UPC: 816211010604 , Code: 4HZ-FAA-BLOODA-PAT-BLD-B-POS-YLO
  • Hazard 4 B- Blood Type Marker, 2 Pack, Black, PAT-BLD-B-NEG-BLK , MPN: PAT-BLD-B-NEG-BLK , UPC: 816211010543 , Code: 4HZ-FAA-BLOODA-PAT-BLD-B-NEG-BLK
  • Hazard 4 B- Blood Type Marker, 2 Pack, Glow in the Dark, PAT-BLD-B-NEG-YLO , MPN: PAT-BLD-B-NEG-YLO , UPC: 816211010567 , Code: 4HZ-FAA-BLOODA-PAT-BLD-B-NEG-YLO
  • Hazard 4 B- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-B-NEG-CYT , MPN: PAT-BLD-B-NEG-CYT , UPC: 816211010550 , Code: 4HZ-FAA-BLOODA-PAT-BLD-B-NEG-CYT
  • Hazard 4 AB- Blood Type Marker, 2 Pack, Coyote, PAT-BLD-AB-NEG-CYT , MPN: PAT-BLD-AB-NEG-CYT , UPC: 816211010475 , Code: 4HZ-FAA-BLOODA-PAT-BLD-AB-NEG-CYT
  • Hazard 4 A- Blood Type Marker, 2 Pack, OD Green, PAT-BLD-A-NEG-GRN , MPN: PAT-BLD-A-NEG-GRN , UPC: 816211010413 , Code: 4HZ-FAA-BLOODA-PAT-BLD-A-NEG-GRN
  • Hazard 4 AB+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-AB-POS-CYT , MPN: PAT-BLD-AB-POS-CYT , UPC: 816211010512 , Code: 4HZ-FAA-BLOODA-PAT-BLD-AB-POS-CYT
  • Hazard 4 O+ Blood Type Marker, 2 Pack, Coyote, PAT-BLD-O-POS-CYT , MPN: PAT-BLD-O-POS-CYT , UPC: 816211010673 , Code: 4HZ-FAA-BLOODA-PAT-BLD-O-POS-CYT
  • Hazard 4 AB+ Blood Type Marker, 2 Pack, OD Green, PAT-BLD-AB-POS-GRN , MPN: PAT-BLD-AB-POS-GRN , UPC: 816211010536 , Code: 4HZ-FAA-BLOODA-PAT-BLD-AB-POS-GRN

Hazard 4 A- Blood Type Marker Unavailable & Discontinued Models

List of Unorderable Models

  • Hazard 4 Hazard 4 Blood Type Lacer 2-pack - O +, OD Green, One Size, PAT-BLD-O-POS-GRN , MPN: PAT-BLD-O-POS-GRN , UPC: 816211010697 , Code: 4HZ-FAA-BLOODA-PAT-BLD-O-POS-GRN
  • Hazard 4 Hazard 4 Blood Type Lacer 2-pack - A+, Glow in the Dark, One Size, PAT-BLD-A-POS-YLO , MPN: PAT-BLD-A-POS-YLO , UPC: 816211010444 , Code: 4HZ-FAA-BLOODA-PAT-BLD-A-POS-YLO
  • Hazard 4 Hazard 4 Blood Type Lacer 2-pack - AB-, Black, One Size, PAT-BLD-AB-NEG-BLK , MPN: PAT-BLD-AB-NEG-BLK , UPC: 816211010468 , Code: 4HZ-FAA-BLOODA-PAT-BLD-AB-NEG-BLK
  • Hazard 4 Hazard 4 Blood Type Lacer 2-pack - AB +, Black, One Size, PAT-BLD-AB-POS-BLK , MPN: PAT-BLD-AB-POS-BLK , UPC: 816211010505 , Code: 4HZ-FAA-BLOODA-PAT-BLD-AB-POS-BLK
  • Hazard 4 Hazard 4 Blood Type Lacer 2-pack - B +, Black, One Size, PAT-BLD-B-POS-BLK , MPN: PAT-BLD-B-POS-BLK , UPC: 816211010581 , Code: 4HZ-FAA-BLOODA-PAT-BLD-B-POS-BLK
  • Hazard 4 Blood Type Lacer 2-pack - O +, Glow in dark PAT-BLD-O-POS-YLO , MPN: PAT-BLD-O-POS-YLO , UPC: 816211010680 , Code: 4HZ-FAA-BLOODA-PAT-BLD-O-POS-YLO
  • Hazard 4 Blood Type Lacer 2-pack - AB +, Glow in dark PAT-BLD-AB-POS-YLO , MPN: PAT-BLD-AB-POS-YLO , UPC: 816211010529 , Code: 4HZ-FAA-BLOODA-PAT-BLD-AB-POS-YLO
  • Hazard 4 Blood Type Lacer 2-pack - A+, OD Green PAT-BLD-A-POS-GRN , MPN: PAT-BLD-A-POS-GRN , UPC: 816211010451 , Code: 4HZ-FAA-BLOODA-PAT-BLD-A-POS-GRN
  • Hazard 4 Blood Type Boot Lacer Markers, 2-Pack O-, Black, One Size, PAT-BLD-O-NEG-BLK , MPN: PAT-BLD-O-NEG-BLK , UPC: 816211010628 , Code: 4HZ-FAA-BLOODA-PAT-BLD-O-NEG-BLK
  • Hazard 4 Hazard 4 Blood Type Lacer 2-pack - A-, Black, One Size, PAT-BLD-A-NEG-BLK , MPN: PAT-BLD-A-NEG-BLK , UPC: 816211010383 , Code: 4HZ-FAA-BLOODA-PAT-BLD-A-NEG-BLK
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Last updated 2026-07-28 UTC.