The BugsAway Convertible Ziwa Pant provides customizable sun protection with a UPF 30 rating, dries quickly, and has security zip pockets to secure your things. The partial elastic waist moves with you when youre most active, and the convertibles 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.