ExOfficio's Women's BugsAway® Impervia Leggings are updated in a soft jersey, but still give you the BugsAway® bonus. A hidden envelope style pocket inside the waistband conceals a credit card or other small items. The stretchy fabric wicks moisture away from your skin and provides odor resistance for days of travel freshness. Patented SILVADUR™ technology delivers silver ions to the fabric surface and activates them in the presence of undesirable bacteria, helping eliminate odor and keeping you fresh for the life of the garment. Sunny day? Built-in UPF 50 shields your skin from harmful UV rays. Their bug-blocking Insect Shield® treatment gives you the invisible, odorless protection of Permethrin and lasts up to 70 washes.