Hard Hat / Helmet Decals Show your safety message with these colorful and bright labels for employees'' hard hats. Safety message labels can remind those all around of the commitment to safety. Vinyl labels are flexible to conform to the curve of a hard hat. These weather- and water-proof labels have self-adhesive back with peel-off liner. Many of the messages can also be effective by adhering to machinery, tool boxes and other safety equipment. Look for particular labels that acknowledge the achievement of safety skills.