The BugsAway Lumen Hoody, featuring Insect Shield, is constructed with a mesh weave that is ideal for hot days when you need to stay cool and protected. The drawstring hood and thumb loops provide maximum protection from bites. Permethrin, the active ingredient in Insect Shield, 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 lasts 70 washings. Do not dry clean.