Bothersome flies and biting insects are kept away from the legs with these fly turnout socks to prevent discomfort and irritation. Specially designed in ventilated Air Motion 3D fabric for increased airflow and reduced heat build up. Stiffened vertical seams at the back of the fly boots keep them secure and elevated. Lightweight and ergonomically shaped, fleece bound edges ensure superior comfort whilst touch close straps allow secure fastening. Set of 4. 80% UV blocking, helping to diminish the risk of sunburn and sun bleaching. Effectiveness may diminish over time. Test carried out in accordance to BS EN 13758-I-2002+AI:2006.