HAZARD 4 Blood-Type Lacer(TM) Tactical Multi-Position Marker 2-pack by (R): O Positive Exclusive design/form-factor for multiple mounting options of blood type patch Snap-hook carabiner for fast clipping to gear or clothing Loops onto most footwear with laces or pull-loops Durable rubber material and flexible, 3-d injection-moulded graphics are always legible; easy to remove and wash Main Material: TPR rubber 3-D injection-moulded