Very good, thicker walled than the FoodSaver brand. I like to freeze stuff before vacuum-sealing to prevent squashing it or moisture leaking. But that sometimes leaves sharp-ish edges on the food. Occasionally that will cause punctures in the FoodSaver bags. So far, not a problem with these. Plus not having to make every bag (I know, first-world problem, but over time that's a lot of time). Overall very happy with these.