Block sun and bugs, and keep the breeze on your back. Back armhole vents and mesh-lined back yoke keep you comfortable, and lightweight, UPF 3, bug-defying repels the pests. Low-profile front pockets fit your phone and passport. Bug blocking: BugsAway® apparel is treated with Insect Shield®, giving you invisible, odorless protection just by putting on your clothes. The treatment is bound to fabric fibers, so it stays in your clothes—not on your skin—and lasts through 7 washes. Ants, flies, chiggers, midges, and ticks don't like it, and neither do mosquitoes, which can transmit insect-borne diseases such as Zika, Chikungunya, Dengue, and West Nile viruses.