The 109I lightweight “invisible” hairnet. Keystone Safety apparel is designed to be your favorite defense against contamination while remaining comfortable to wear. Our high quality materials conform to the most rigorous and documented test standards and undergo independent quality testing to ensure constant performance. Each lot is inspected for size, material, and workmanship. Clean room compatible. Light weight, strong/durable and non-linting. Flame-resistant. Case include 10 boxes, 1Gr each.