We know that using this zipper trick can help to deter stealthy thieves from getting to your valuables but when it comes to more brazen criminals what your bag is made of can make a big difference. Slash attacks are when a crook cuts through your backpack to get at its contents, either when it’s on your back or when it might be under your seat on a bus or train.

To see whether or not nylon’s strength is worth its weight in protection versus lighter polyester and then even cheaper fabric blends, I put them to the test. Using several sharp kitchen knives I cut to the bottom of the question and found that material matters but not the way you might think. You can see the results in the video above to see whether your backpack holds up or what you might want to look for in your next luggage.

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