If you need labels that are not as expensive as polyester, but perform equally well for long lasting labels, polypropylene is your top choice. It prints well, endures harsh conditions like abrasion, moisture, chemical solvents, UV, and it is very durable. One of the negative aspects of using polypropylene is that it has a low heat resistance. If you need labels for curved surfaces, matte polypropylene offers some flexibility and is resistant to scratching and smearing.