Purex Crystals is an in-wash fragrance booster, which provides freshness that lasts for weeks. Use a little or a lot, directly in the laundry! Add Purex Crystals to the start of the wash cycle with detergent. It spends more time with your laundry injecting it with a fresh scent that lasts for weeks, not days. Safe for all loads including towels, activewear & children’s sleepwear Fabulously Fresh – Life is your runway. Showcase your fabulous scents of style and give your laundry an incredible just-washed freshness that lasts for weeks.