Masta Avante Fly Rug Grey. The Masta Avante Fly rug is a geeat value fly mesh rug, made form lightweight and breathable fabric. The Avante fly rug features twin surcingles and hook and loop fastenings at the front to make rugging up quick and easy. The rug also offers reflective badging, anti-rub satin on the chest and neck area, fillet string and adjustable cross surcingles. Fly rug available in sizes 4'6 - 7'0.