"I have 2 golden retrievers (who "do their business" about twice a day), and have lived only in large cities like NYC and Chicago where picking up your dogs' mess is a necesssary task or you risk a $500 fine. I have used a lot of different bags, both ones that you get free from a retail store and ones that I have purchased in bulk. These are by far my favorite bags - they open fast (no standing there in a blizzard trying to figure out which one is the "top") and the ties are just the right length to close up the bag and carry it until you get to the nearest trash can. My husband, who does the majority of the walks in the winter, always insists that we have a steady supply of these particular bags on hand."