Just make sure you use them up within a year!  I got these for the occasional 'babysitting" I do for my relatives dog.  I am not used to picking up dog waste and these are thicker than other bags they gave me to use - so that part is good, while they lasted.  BUT they do not have a very long shelf life.  I used them about once a month for a day or two, and when I went to take one off to use it last time, the side seam just designated!  Ripped wide open.  Inspected the rest of the lot and all are the exact same - totally unusable now.  What a waste of money, I only used about 24 of them.  Who would have thought they would have an expiration???