Tide Brights + Whites Rescue™ color safe in wash laundry booster pacs get clothes up to three shades whiter in one wash. Containing unique oxygen bleach technology not found in liquid detergents today, they're formulated to fight dinginess and dullness and help restore and brighten whites. Tide Brights + Whites Rescue™ pacs prevent yellowing by breaking down body soils and residues, so you can be sure your whites stay white and your colors are kept safe.