Description of Ex Officio Mix'r Dobby S/S Shirt Take the breezy Mix'r Dobby wherever you go. With its built-in sun protection, it keeps away harmful UV rays and keeps you cool with climate control ventilation. Features: 3.5 oz/sq yd Imported Lightweight Mix'r Dobby: 68% Polyester / 30% Cotton / 2% Nylon Sun guard UPF 30+ protects you from harmful UV rays Back yoke ventilation and side hem vents keep you cool Security zip chest pocket Wrinkle resistant and quick drying so you feel good