Excellent for cleaning rough, abrasive or irregular surfaces, yet soft enough for delicate surfaces. Use these 100% interlock knit polyester wipers where low particle and fiber contamination are most critical. Appropriate for use in electronic, semiconductor, aerospace, pharmaceutical, medical device, research, and education industries. No-run interlock knit provides durability for vigorous cleaning. Edges are sealed for reduced lint and fiber. Laundered in an ISO Class 4 (FED-STD-209E Class 10/M2.5) cleanroom to further reduce particulate and extractable contaminants.