The Radians SV59Z-3 Type R Class 3 Heavy Duty Surveyor Vest is a Contractor Surveyor's vest with large back "plan" pocket and zipper closures. Built with rugged ANSI 107 hi-vis material, reinforced wear points, and long-wearing web reinforcement along outer edges. Mesh upper and sleeves, front and back, for breathability and comfort. Pockets in tough woven twill fabric provide maximum durability.