Durable white polyester labels provide strong protection for harsh environments or conditions and resist moisture, scuffing, tearing and smudging. Ultrahold adhesive sticks to more tough surfaces ensuring your label doesn't fall off your package. Extra-strong adhesive adheres to metal, plastic, glass and more. Weatherproof labels with TrueBlock Technology are guaranteed to completely cover everything underneath so you can re-use mailing tubes, boxes and more. They are easy to customize with online free templates and designs using Avery Design and Print. The 8-1/2" x 11" sheets of labels are compatible with laser printers.