Purex Crystals are a crystal-form in-wash "fragrance booster" (and formerly a crystal-form in-wash fabric softener) manufactured by Henkel and marketed in the United States and Canada.
Introduced in 2011,[1][2] the Purex Crystals product was the first crystal-form fabric softener sold in the United States.
[3] According to an article in Good Housekeeping, the Purex Crystals fabric softener could safely be used on active wear and children's polyester sleepwear without harming flame resistance properties.
[4] In January 2013, the company launched a version made specifically for babies.
[6] The company also uses "Purex With Crystals" as a branding label for liquid and powdered laundry detergent.