The lightweight BugsAway Lumen Hoody is Insect ShieldŽ Repellent Apparel from ExOfficio, and is constructed with an open mesh weave that is ideal for hot buggy days when you need to stay cool and protected at the same time. The drawstring hood and thumb loops provide maximum protection from bites. Permethrin, the active ingredient in Insect ShieldŽ, is invisible, odorless, and so tightly bonded to the fabric fibers that it retains effective repellency through the life of the garment. It repels mosquitoes (including those carrying West Nile virus and malaria), ticks, ants, flies, chiggers and midges (no-see-ums). Insect Shield repellent apparel lasts through 70 washings.