Durable Poly/Cotton. Zippered chest and back pocket. Stain release. Tool pockets & loops. Heavy-duty brass zippers on front pockets,left back pocket, and 2-way front zipper. Bi-swing back, rule pocket & Hammer loop. Large back pockets. Concealed snaps at waist, neck & faced cuffs. Stain release finish. 7 1/2 oz. Twill, 65%Polyester/35% Cotton.