Description For heavyweight protection that wonât weigh you down, choose Pro Markâ¢ Apron Chaps - 9 Layer from STIHL. Theyâre rugged, yet comfortable to wear and easily fit over your work clothes. Sewn into the legs of the chaps are nine layers of AverticÂ Pro by EngtexÂ, a cut-retardant material designed to reduce the risk or severity of injury to the body parts covered by the pads in the event of contact with the rotating saw chain of a gasoline-powered chainsaw. The open-back design of these chaps makes them a great choice for hot working conditions. These Pro Markâ¢ apron chaps provide three additional layers of AverticÂ Pro by EngtexÂ cut retardant material than our standard apron chaps. STIHL chainsaw protective apparel is also wash and wear, unlike some other brands that require dry cleaning or light surface cleaning. These chaps feature a reflective waistband for better visibility, a zipper cargo pocket for easy storage, and an abrasive knee for bending and kneeling.