Hazard 4 Gas Mask Patch Black. As seen in the film COPS this emblem is the symbol for gas mask use and should be proudly displayed. This self-adhesive safety patch is durable and washable ensuring reusability. The Hazard 4 Tactical Gas Mask Patch is a superior morale patch for those who earnestly pursue a life in gas mask use. Don't forget to see the full line of Hazard 4 products along with our tactical accessories offered in our online store. Specifications for Hazard 4 Gas Mask Patch: Manufacturer: Hazard 4 Gender: Unisex Size: One Size Height: 82 mm 3.2 in Length: 3.2 in 82 mm Style: Original Casual Performance Quantity: 1 Application: Around Town Duty Work Tactical Seasonal/Temperature Use: All Seasons Fabric/Material: Rubber Age Group: Adults Features of Hazard 4 Gas Mask Patch durable rubber material easy to remove and wash Package Contents: Hazard 4 Gas Mask Patch Hazard 4 PAT-GAS-BLK: Gas Mask Patch Black