Synthetic material stands up to 1000+ contact scans! PAR-TUFF Durable Kimdura Labels are perfect for any situation where your bar codes are subject to environmental abuse. Made of STRONG, DURABLE, WHITE SYNTHETIC label stock, these labels are designed to withstand abusive warehouse, video, laboratory and industrial applications. Resists heat, humidity, and temperature extremes. No lamination necessary. Special thermal transfer printing media is designed to withstand scuffs and abrasions in the most demanding situations.