The amazing reason why this £380 rucksack is selling out

In the last few weeks parents across the globe have been splashing out on new uniforms and equipment ready for their kids to go back to school.



But in America there's an expensive rucksack which is flying off the shelves, and the reason why is simply heartbreaking.



The black rucksack costs $497, which is about £380, there's nothing fancy or fashionable about the simple design.



But it is bulletproof, and can turn into a full vest protecting a student's front and back in just two seconds.