· Durable white polyester labels provide strong protection for harsh environments or conditions and resist moisture, scuffing, tearing and smudging. · Now with Ultrahold™ Adhesive that 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! · Extra-strong adhesive adheres to metal, plastic, glass and more.