Nature's Miracle Laundry Boost removes tough smelly odors left by pets. Use with laundry detergent for advanced stain, odor and allergen remover. Odor-Lock technology traps and dissolves pet odor molecules for permanent removal of odors. Phosphate-free cleaning system, with fewer chemicals, safely dissolves pet urine, feces, blood, vomit, grease and much more. 32 oz.