NAF Five Star Respirator Boost. Keep your horse feeling themselves by keeping their airways clear and healthy with the NAF 5 Star Respirator. Respirator has been designed to provide the nutrients needed to help encourage a healthy respiratory system by supporting the mucosal immune system and the delicate capillary blood vessels that surround the lungs. Research has been found that providing the body with naturally sourced anti-oxidants gives the lungs the support they need. Respirator contains a concentration of naturally sourced antioxidants as well as a mix of beneficial herbs such as ginger, rosehip and blueberries which helps to target and support healthy lungs. The essential oils within Respirator Boots also help to maintain clear airways. Respirator is also recommended to use for horses that are in close contact with other horses and where respiratory stress may be a concern.