I have been using Glad force Flex bags and I can say they are very strong! I use them in my kitchen most of the time but that is not what amazes me. I have 3 Saint Bernards and cleaning our backyard is no fun! I have filled the bags full capacity with their waste and they definitely do the job!!! Not to mention  that we use them for weeds and I haven’t been any more pleased. You won’t waste your money they are great quality!