Designed to trap airborne odors and helps keep rooms smelling fresh. The odorless， non-toxic volcanic rocks have millions of surfaces and channels containing an electrical charge that acts as a magnet to attract and hold unpleasant airborne odors. The all-natural rocks are renewable and can continue to work for years. Environmentally safe and can be placed near pet odors， in basements， garages， closets， offices， warehouses， underneath car seats or in other areas where lingering odors are a problem. Scent: Fragrance Free Physical Form: Volcanic Rocks Application: Odor Control Capacity Weight: 32 oz.