We stand out from our competitors by printing all of our hard hat stickers on highly conformable Premium 3M Sticker Vinyl with air-egress technology on the glue layer. Premium 3M Sticker Vinyl with air-egress technology has tiny grooves on the glue side that allow you to work any air trapped under the sticker to the edges where it can then be released, eliminating the bubble. When applying large hard hat stickers greater than 2 inches in the vertical dimension, you may find that they are harder to conform to the rounded hard hat surface. In these situations, applying mild heat to the sticker using a hair dryer or heat gun will aid in softening the vinyl sticker, making it easier to conform to the curvature of the surface.