Function Apron Chaps - 6 Layer from STIHL are made from rugged, 400-denier nylon and feature the same UL® classified protection as our other chaps. Just snap them over your pants and you’re ready to go. Sewn into the legs of the chaps are six layers of Avertic® Pro by Engtex®, a cut-retardant material designed to clog the sprocket and stop the saw chain on a gasoline-powered chainsaw in case of accidental contact with the rotating saw chain. The open-back design of these chaps makes them a great choice for hot working conditions. The Woodcutter Protective Apparel is perfect for paired use with any of your Homeowner STIHL units. While designed for the occasional user, it still meets and beats the standards required for personal protective apparel.