In hot, muggy, buggy conditions, the mesh perforations in this lightweight shirt allow airflow to keep you cool and comfortable, with BugsAway treatment and sun protection built in. Features a Insect ShieldA(R) insect repellent apparel repels mosquitoes, ticks, ants, flies, chiggers and midges (no-see-ums) a Quick-drying, lightweight fabric a Sun protection with an ultraviolet protection factor (UPF) of 20; Collar adjusts to three heights for additional sun protection a Vents at back enhance breathability a Sunglass-cleaner chamois patch inside bottom left placket a Roll-up sleeve tabs a Offset shoulder seams for additional comfort when traveling with or without a backpack Specifications: a Product Weight: 0lbs 10.3 oz (292 g) a Main Fabric: 100% Polyester Mechanical Stretch Plain Weave 3.39 oz/yd^2 a Center Back Length: 29in a Style Number: 1101-3396