Grippaz use a specially formulated nitrile compound that gives unrivaled grip when handling grease, oils, detergents, solvents & water. US Patent No's D735, 968S & 9,730,477 B2. EU Certificate of Registration Design Number 001 402432-0001 and 396204-001. Available in medium (Part No. 37300), large (37301), extra large (37302) & extra extra large (37303). AS SEEN ON TV. Worldwide Patent 'fish scale grip technology' along with Patent on the thumb grip design. Anti virus & bacteria certified. CE certified. Manufactured to EN374-1:2003 & EN374-2:2003. 100% Silicone FREE Nitrile glove made in a Silicone FREE factory. 100% Nitrile - Latex Free, no added fillers so sweating is prevented. Chemical resistant , can be washed or wiped clean. SATRA tested to perform UP TO 5 TIMES BETTER in oily, greasy, dry or wet conditions. First glove to also have grip technology inside the glove to add to the overall grip. Made with 'Touch Screen Technology' so devices like smart phones, tablets, diagnostic