Antimicrobial: Antimicrobial fiber has been shown to inhibit the growth of microorganisms such as bacteria and mold that come in contact with the fiber up to 99.9%. These properties will not wash out of the fiber and will last the life of the sleeve. PolyKor: Products constructed with PolyKor® engineered yarn are suitable for protection against mechanical hazards in the toughest environments. PolyKor® products can be designed for different protection levels, up to the highest levels, while maintaining an unprecedented level of comfort. They are also highly resistant to abrasion and chemicals, so you can rely on them to provide long-lasting protection.