From Earth Rated: Earth Rated® waste bags are vegetable-based, natural ingredients and meet the ASTM D6400 guidelines. An excellent alternative to the green-colored bags, these unscented bags can be disposed of in a municipal compost environment, where pet waste is accepted. These bags are bigger, thicker, tougher and totally leak-proof! This refill pack includes 4 rolls of 15 unscented bags that fit into most standard-sized leash dispensers. Earth Rated® products are the industry leader in terms of quality, and most of all, affordability. At Earth Rated®, we don't leave out the littlest of details - even our rolls' cores and packaging are made from recycled content!