Shop Portwest Hi-Vis Polo Shirts at Kustom Workwear. Portwest is an industry leader in providing high-visibility work polos to Ireland's trades. Constructed from high-quality, breathable materials, hi-vis work polos from Portwest are designed for visibility, safety and wearer comfort without restricting movement. Fully certified and compliant and available in different styles and colours, including fluorescent yellow and orange, they are the ideal choice for tradespeople, construction workers and site workers. Browse the full collection.