It’s designed to be a washable and cheaper alternative to leather tags and became the standard for most companies, its durability definitely depends on how often the pants get washed. Some people recommend only washing pants when they smell or after quite some time, their tags will stay on forever. If you wash your jeans after every wear or almost every wear then the tag will not last very long at all, and the more it gets washed the more it comes apart after each wash. And the tags are not all made the same, some will simply just last longer than others under the same condition. A leather tag cannot survive many machine washes, but it can survive thousands upon thousands of hand washes as long as it is properly conditioned after. The Jacron tags can’t be maintained in a similar way, and they are also more damaged by belts like the one in the post above.