Kimtech Pure W4 Dry Wipers are perfect for sensitive environments like clean rooms, medical equipment manufacturing or the biotech industry. They are specially designed for ISO Class 4 and higher cleanrooms since they are anti-static, double-bagged for extra protection and low lint so these wipers are good for environments where lint-free is important. Their unique, textured surface is absorbent so you can use them for a variety of tasks. Their clean, knife-cut edges reduce lint. Made of 100 percent polypropylene, they are acid-resistant, base-resistant and solvent-resistant. These disposable wipers are ideal for use in pharmaceutical, high-tech, biotechnology and medical-device industries that require critical tasks.