The BugsAway Ziwa Convertible Pant provides sun protection with a UPF 30+ rating, dries quickly, and has security zip cargo pockets to secure your things. The partial elastic waist moves with you when you’re most active, and they zip off to 10” shorts. Permethrin, the active ingredient in Insect Shield®, is invisible, odorless, and tightly bonded to the fabric fibers, and lasts the expected lifetime of the garment (70 washes). It repels mosquitoes (including those carrying West Nile virus and malaria), ticks, ants, flies, chiggers and midges (no-see-ums).Insect Shield repellent lasts 70 washings.