The Prozap Bovi-Strips face flaps are designed for use with the Bovi-Rub for effective and economical control of face flies, horn flies, lice and ticks on cattle and other livestock. Simply tie the Bovi-Strips to the Bovi-Rub for additional insecticide application to the face and sides of cattle and other livestock. Superior wicking action allows for low-stress application of insecticides. Use Prozap insecticides for optimal results.