Sure, oxygen is 'most popular' for maintaining life on Planet Earth, but have you discovered its second-most popular use? We have! Used with Nellie's Laundry Soda, Oxygen Brightener uses the power of oxygen to penetrate stains and strip away dirt, odor and grime. As a safe alternative to bleach, it keeps your colors bright and your whites white. Above all, the formula is chlorine-free, color-safe, septic-safe and hypoallergenic. You're welcome, Planet Earth.