UV ProtectionProtection from Mosquitoes / FliesHook and loop ClosureSagging free designSold in pairsThese Hilason fly boots prevent flies from biting your horses lower legs. The unique design prevents sagging and shifting. Soft nylon trim adds comfort while eliminating burr and grass seed collection. Hook-and-loop closures provide an adjustable fit, adapting to your horses conformation. Set of two.