Bug-repelling, sunblocking, and venting, the Viento provides a side-to-side breeze in an anti-odor, UPF 30 ripstop fabric. A hidden zip pocket on the right keeps your passport secure. Fresh: The patented SILVADUR polymer delivers silver ions to the fabric surface and activates them in the presence of undesirable bacteria, helping eliminate odor and keeping you fresher for the life of the garment. 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 70 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.