InsectSheild Mosquito Body Suit (X-Large) InsectShield Treatment Repels Mosquitos InsectShield uses permethrin which is a man-made version of a natural insect repellent found in a type of chrysanthemum plant Elastic at waist, sleeve cuffs and ankles ensuring no bugs breeching suit. Jacket features a zippered front for easy on and off Body suit includes head net, jacket and pants, all made from fine polyester no-see-um mesh; all 3 items fit in the included nylon storage bag