The crystallizing polymer micro-encapsulated soil particles and will not reattach to the carpet fiber. Encapsulated residue that is left in the carpet following cleaning can be extracted from the carpet during the routine post-vacuuming process. No rinsing is required. This product adds OXYGEN to the cleaning to loosen protein based soil and is effective at removing blood, coffee, chocolate, red wine, urine stains, browning, food stains, and more. Safe for wool.