Dog waste bags are a must have for every dog walk.  The replacement rolls of the Doo-N-Go oxo-biodegradable waste bags come in packages of 3. Each roll consists of 35 biodegradable waste bags, totalling 105 waste bags per package. Each roll has a center pull design with bags dispensing from the center of the roll.  Works well on its own but even better with the Leash Bag.