The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. HOW TO USE TAS LOCK? Open the lock(the original lock is 0-0-0)and release the zipper headsPress down the reset button with a tool such as a Pen until hear the "Click"Set your number combination by turning the dials（for examples:8-8-8）Push the button to the open position and let reset button back until hear the "click" sound Breathable decompression The back of the backpack is made of elastic, breathable material.It is shockproof and protects the items inside the backpack. It's breathable and can take away heat without overheating your back. Waterproof Backpack Made of selected high quality Polyster material, it has strong waterproof function. Even in rainy days, it can keep the items in the bag dry. TAS Lock The TSA lock can prevent theft and well safeguard all your valuables securely. Adjust Tightening Buckle Adjustable buckle reduced stress on the zippers. So if travel with a partially packed bag, you can preventing the contents from sloshing around Anti Theft Pocket Put our phone, wallet, card into the back anti theft pocket. It's safe and convenient. Adjustable Shoulder Strap With the adjustable buckle you can adjust the shoulder strap based on the different body.