Apollo Bio-Filter Inline Moisturizer and Clean Air System for any brand regulator. Tank air is extremely dry. Dry air is hard on your body. It can cause dry mouth, sore throat and make clearing ears difficult to impossible. Moisturize adds 70% humidity to air stream. Every breath you take is cleaner and more comfortable. New chromed brass version now available in stores.

Apollo Sports USA Inc.
Booth #727
http://www.apollosportsusa.com/bio-filter.html