PRODUCT USES: This short sleeved vest uses lightweight, cooling mesh fabric in combination with our jersey fabric for comfort and durablity. DESIGN AND FUNCTIONALITY: The Vest-Port extensive range of vests covers the varied demands of the work environment from core styles to the revolutionary "Executive" design. MATERIALS: 100% Polyester, Warp Knit 3.5oz. Portwest products are manufactured to the highest standards with quality materials to ensure durability, comfort, and style. PRODUCT CARE: Max wash temp 40°C, mild process. Do not bleach. Do not tumble dry. Line dry. Do not iron. Do not dry clean. STANDARDS: ANSI/ISEA 107 TYPE R CLASS 3.