Our advanced TrueBlock technology lets you fully cover up everything underneath the 5.5 x 8.5 labels,so you can reuse boxes and block out markings and mistakes for a polished,professional look on the bright white labels. These address labels are optimized for laser printers so you can easily print vibrant colors and crisp,bold text without worrying about printer jams or ink smudges. Create professional-looking labels quickly. Adhesive sticks to more tough surfaces,ensuring your label doesn't fall off your package. Labels with TrueBlock Technology are guaranteed to completely cover everything underneath so you can re-use mailing tubes,boxes and more! Easy to customize with free templates and designs. This product was made using wood sourced from a certified managed forest.