4"x6" Thermal Labels, clear printing, waterproof, alcohol-proof,oil-proof, resistance to scratches and smudges. high-quality thermal label won't fade away even when it's splashed by water, oil, alcohol, or scratched by fingernails. Make sure this shipping labels won't be easily damaged during shipment. easy to peel off, adhere packaging surface tightly with premium strong adhesive glue, No worries about shipping labels falling off. Compared to low-quality thermal labels, by using premium thermal shipping labels, you will get improved printing quality, avoid print failure or label waste.