I was using small plastic bags off a roll I bought at the local pet store for picking up after my dog. They were flimsy and not very easy to use. Then when walking my dog at the local metro park I discovered mutt mitts. My town provides them for clean up in the parks. There are sturdy, easy to use and biodegradable. I initially ordered 400 and in the last year have used most of them. I recently ordered another 200. The construction of the mitt is great... a plastic mitt that goes a little more than midway (on me) to the elbow and has a double layer of plastic on the pick up end. You simply put it on like a large mitten grab the dog "residue" and fold the sleeve inside out and using the long sleeve tied into a knot seal the bag. I keep a garbage can at the end of the driveway to keep the mitts in until pickup day. Much better and easier to use than the usual flimsy bags from the pet store... highly recommended.