Bags using the exo technology will degrade into small pieces then safely biodegrade into soil. This bag is fully biodegradable and made from over 20% renewable materials. We should all consider the environment when it comes to the use of plastic bags. On average a dog owner will use 4 to 6 poop bags per day which is approx 2190 plastic poop bags per year, per dog and how many dogs are in just Britain alone. That is why we must make the change and use 100% biodegradable poop bags. The great thing about these bags is the quality is just the same, the price is great and you are doing your bit for the environment. Bag'Em poo bags may cost a little more than standard black bags however you can buy with confidence knowing that the bags you use to clear up your dog poop will biodegrade in a reasonable time and will not harm our environment and planet.