Bio Bag Premium Pet Waste Bags Made from a resin derived from plants, vegetable oils and other polymers Alternative To Regular Plastic Bags Clean & Responsible Bags are black to hide contents after use BioBags are manufactured in the USA Made from plants, vegetable oils and Mater-Bi Great alternative to regular polyethylene plastic bags Should be used within one year of purchase and stored in a cool, dry place Comes in standard size, large size and on roll for easy portability Pack of 4, 50-count boxes (total of 200-counts)