OEM Dymo Poly Shipping Labels are designed for odd-shaped mailing, conforming to curved or uneven surfaces. These labels are made from a special tear-resistant material that is also resistant to oils, fats, blood, alcohol, and other solvents. The polypropylene construction ensures high durability, with a weather-resistant and moisture-resistant design that can withstand water immersion for 24 hours and endure temperatures up to 40 degrees Celsius for 24 hours. Additionally, they can withstand heat up to 140 degrees Fahrenheit for 24 hours, making them ideal for various shipping needs.