Stihl's different models certified for either 3,000 or 3,600 threshold chain speed. Meets cUL/BNQ and Workers’ Compensation of BC PPE 14.1 respective standards®. 4 layers of nylon/polyester/Kevlar. Reflective striping on each pant leg meets CSA Class 2, Level 2 standard, cotton and standard waist band pant has a cargo outer pocket on the leg.