82% Spectra, 18% Polyester Imported Double Ring closure Hand Wash Only SPECTRA CUT RESISTANT ARM SLEEVES: Spectra Cut Resistance arm sleeves are made up of Spectra, the worlds strongest and lightest fiber. They are perfectly designed to protect your arms from the avoidable scratches while doing labor work and sports as well. Wear Spectra arm sleeves for ultra-protection! POUND-FOR-POUND MATERIAL AND DESIGN: 82% of Spectra in these Kezzled arm sleeves is 10 times stronger than steel, softer than polyester and 40% greater than Aramid fabric. This heavy-duty fabric gives you ultra-protection from UV rays, cuts and scratches you get while on your job and in ground while playing sports. 18% of polyester used in these arm sleeves keeps your arms dry while you sweat yourself out doing hard jobs. No bruises; No skin irritation!