I ordered these charging cables because of the different sizes offered in a pack of 4. It always seems like most backpacks have 2-3 foot cords which I find relatively useless. This backpack has 1 and 2 6ft cords, which can be used much more conveniently. They also fit into the iPhone charging port that I've come across with other cables. No more spending money to find out the ends don't fit my phone.