Label stock is 3 mil high-density polyethylene for both direct- and transfer-thermal printing. They can be handwritten or used with laser, inkjet, and dot-matrix printers. Flexibility allows them to adhere to textured surfaces and mold to shape of object. Sythetic material ensures label is waterproof, chemical and tear resistant, UV stabilized, puncture resistant, and able to endure temperatures from -20 to 140°F.