Earth Care Odor remover Bags removes the odor even if carcass is not removed Absorbs odors like a sponge no fragrance, no cover ups To Use: Place a ag in each room that has an odor. If you need pest odor control in an attic or basement, place additional bag in those areas as well. In 24 hours the odor is gone (98% of the time) Last 3-4 months in use or indefinityly in plastic wrap.