This ExOfficio button-down Baja shirt is part of their Insect Shield clothing line that is treated with Permethrin. It has an SPF rating of 30. It has two front chest pockets (one pocket has a zipper), roll-tab sleeves, front pin tucks, back pleats, underarm and back yoke ventilation to keep you cool. It is a great outdoor shirt for hiking, camping, fishing, or field work. 65% polyester, 35% cotton. Style is 2101-0960. Color is Bone. Size S. The care tag claims to repel ticks, ants, mosquitoes, flies , chiggers, and midges. Original repellancy remains effective for 70 washings. I don't know how many times this shirt has been washed or how effective the original insect repellent remains. Armpit to armpit: approximately 19" lying flat Length: 27" There is one yellowish stain on the right elbow area. Otherwise, this shirt is in very good condition with no holes, rips, or tears. From a smoke free and pet free home.