Horsewares Amigo Bug Buster The Amigo Bug Buster from Horseware Ireland is permethrin treated for superior fly protection. The Amigo Bug Buster is made from knitted polyester that is ultra breathable. Patented Leg Arches allow freedom of movement while the tail strap and third surcingle keep the Bug Buster in place. Surcingles fasten straight. Extra depth allows the flysheet to be wrapped around the horses belly for added protection. A removable neck cover with mane liner is included! The No Fly Zone (NFZ) technology was developed as an effective and powerful anti-insect technology. With its active ingredient being Permethrin, it is an odorless and invisible film on your sheet that will last for 70 washes to provide protection from mosquitoes, flies, ants, ticks, and midges. Make your horse a fly free zone!