Explore buggy locations with confidence, thanks to the ExOfficio Men's BugsAway Briso Long-Sleeve Shirt. The UPF-50 rating protects you from the sun's dangerous UV rays, and an action back vent keeps you cool. Simply roll up your sleeves when it gets too hot. Tabs keep your rolled-up sleeves in place. Lightweight and quick drying, the garment is treated with an odor-resistant SILVADUR™ antimicrobial finish, so you can pack a little lighter for your next trip. One hidden zippered security pocket at the left side safely stows your passport out of sight. BugsAway apparel is treated with Insect Shield®, giving you invisible, odorless protection just by putting on your clothes. The treatment binds permethrin to fabric fibers for the life of the garment, so it stays in your clothes—not on your skin—and lasts through 70 washes.