PRODUCT USES: Stylish summer shorts, the modern knee-length style and contrasting trims have made these shorts a favorite for hot days. DESIGN AND FUNCTIONALITY: Combining safety and style, fabrics within our hi-vis workwear ranges are made from a premium durable polyester/cotton. MATERIALS: Kingsmill: 65% Polyester, 35% Cotton 245g. 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. Drip line dry. Do not iron. Do not dry clean. STANDARDS: ANSI/ISEA 107 CLASS E. EN ISO 20471 Class 1.