Sure, oxygen is most popular for maintaining life on Planet Earth, but have you discovered its second-most popular use We have! Nellie's 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.Use in a machine wash, as a pre-soak or hand wash, general stain removal, or carpet spot remover.