75 to 80% calcium chloride treated medium grade solar salt, plus 15 to 20% calcium chloride flake. Calcium chloride and potassium chloride allow the sodium chloride to work at lower temperatures. Ideal for use in parking lots and on sidewalks. Effective down to -15 degrees Fahrenheit. Size: 20 Lb. Product Form: Flakes Temperature Range: -15 Deg F Safe For Pets: Yes Safe For Vegetation: Yes Active Ingredient: Calcium Chloride