This heat-resistant sleeve is made with DuPont Kevlar fiber which protects from abrasive and sharp materials for a variety of work applications. 18 in. – Thumb slot. Made with aramid fiber. Heat resistance properties. Sold by each individual sleeve. ANSI Cut Level A3. ASTM F2992-15 Results = 1,143 grams. DuPont? and Kevlar? are trademarks or registered trademarks of E.I. du Pont de Nemours and Company.