Block both the sun and bugs in the lightweight Men's BugsAway® Halo Long-Sleeve Shirt. The durable, abrasion-resistant, and quick-drying nylon can handle remote trails and tough hikes. Bug-blocking Insect Shield® treatment gives you the invisible, odorless protection of Permethrin and lasts up to 70 washes. If your adventure heats up, use the secure tabs to roll up your sleeves and feel the breathability of the back vents. Built-in UPF 45 shields your skin from the sun's dangerous rays. Offset shoulder seams ensure you stay comfortable if you're traveling with a backpack. If not, stow small gear in the hidden zippered right pocket.