Our new Wetland Performance series is the most technical Marsh Wear offering to date. Constructed from an airy knitted blend fabric, it is guaranteed to be the most breathable sun shirt you have put on. With discrete ventilated mesh underarms and thumb loops to keep your sleeves from riding up while casting, these shirts will keep you comfortable all day on the water. UPF 40 Sun Protection Breathable Knitted Poly/Rayon Construction Stain Resistant Quick Drying