Yellow Dog HVAC American Flag Hard Hat Sticker - 3" x 1" HVAC American Flag Hard Hat Sticker - 3" x 1" All stickers are PROUDLY printed in the USA by Project Thin Line. Project Thin Line only uses high quality Eco-Solvent Inks, on a weather resistant vinyl material. We take the extra step of coating ALL of our stickers with a Glossy Clear Lamination to provide additional protection. MOST competitors skip the lamination step to save them money, increase their profit and give their customers an inferior product! Great for indoor and outdoor use - Vibrant colors and long lasting material.