Very strong durable bags.
I use my R size bags in the trashcan that hooks over or mounts to a cabinet door.
I use it with my cat's scoopable litter.
Heavy sand clumps.
In several months of weekly use of these bags, neither the bags nor their tie handles have failed.
I needed these good, durable bags because nobody wants to clean up THAT mess from a failed flimsy plastic grocery bag!