Can you name a country where there are no mass shootings? Arguably this item could be as useful anywhere as in the US. Mass shootings are rare per capita, even in the US. The risk is negligible yet people will still buy these products.

Edit: the point is that the low effort comment of other countries passing laws and not needing this are not adding to the discussion. You can find armor products for civilians, including backpacks, in other countries that have low levels of gun violence. If the problem is truly solved in that country then why do they still sell these products?

The point should be to have an actual discussion about what would fix the issue. You mention laws, but then there's no mention of what those laws would entail.