reinforced bottom ,which is Light-weight Carrying and perfect for business traveling, weekend getaways, school, shopping and other outdoor activities in daily life.    - External USB with built-in charging cable offers a convenient charging of your electronic device anywhere.Designed for Micro-USB product.    - Compartments offer a separated space for your Laptop, iPhone, iPad, passport, pen, keys, wallet, watch, charger baby, Mp3, 4A file, books, clothes, umbrella, bottle and more. Easy find what you want.    - Two side sealed pockets provide a more sturdy and security load than other mesh pockets.    - Soft lined laptop sleeve holds laptops less than 15.6 inches, offering enough space and great comfort.    - Included metal zippers which is theft proof and reliable,protecting wallet and other items inside from thief and offering a private space.Utra Protective: This Backpack apply anti-theft design techology. Zipper of main pocket is fully hidden in the back of this bag, no theft will easily open your backpack, makes your valuables more safer.This is a safe backpack for you to walk in the nightExternal USB with built-in charging cable offers a convenient charging of your electronic device anywhere Apply high quality EVA material, back of this backpack will not change the shape even in a heavy carry, which will protect your back and your laptop. Very comfortable to carry and it's so ventilate, you will never feel hot by carrying this anti- theft backpack.Multiple Compartments:Most of your living necessities can be hold inside, such as keys, wallets, cellphones, books, 15" laptop, etc.You also can fix it in a suitcase .External USB with built-in charging cable offers a convenient charging of your electronic device anywhere.Designed for Micro-USB product.    - Compartments offer a separated space for your Laptop, iPhone, iPad, passport, pen, keys, wallet, watch, charger baby, Mp3, 4A file, books, clothes, umbrella, bottle and more. Easy find what you want.    - Two side sealed pockets provide a more sturdy and security load than other mesh pockets.    - Soft lined laptop sleeve holds laptops less than 15.6 inches, offering enough space and great comfort.    - Included metal zippers which is theft proof and reliable,protecting wallet and other items inside from thief and offering a private space.Utra Protective: This Backpack apply anti-theft design techology. Zipper of main pocket is fully hidden in the back of this bag, no theft will easily open your backpack, makes your valuables more safer.This is a safe backpack for you to walk in the nightExternal USB with built-in charging cable offers a convenient charging of your electronic device anywhere