A lightweight travel shirt that youll love and bugsll hate. Made to give you reprieve from sun and pests, the Exofficio Mens BugsAway Baja Sur Long Sleeve Shirt provides functional comfort outdoors while working, fishing or traveling. The fabric is treated with Insect Shield binding invisible and odorless repellant to each fiber. Flies, ants, ticks and mosquitoes will all give you some extra space, holding irritation and possible disease at bay. The treatment keeps the repellant on the fabric instead of your skin and lasts for up to 70 washes. The shirt is constructed for comfort in the heat and sun as well. The sides have an adjustable mesh woven into the fabric, along with the back yoke mesh lining, to increase ventilation and speed up drying. The fabric itself is treated for UPF30 sun protection. Key Features: Insect Shield treatment for built-in insect repellant UPF30 sun protection Lightweight, quick drying Adjustable mesh ventilation Hidden security zipper in chest flap pocket 55% cotton / 45% polyester Imported