High elastic air cushion and elastic pearl cotton pad are used inside, and the shockproof air cushion partition can slow down the damage of vibration to the computer. The exterior is made of smooth polyester fabric, which is fully waterproof and more secure.Humanized design, can be set with luggage straps, which is more convenient to travel. Separate computer compartment with built-in shockproof air cushion. With a free shoulder strap, you can carry one shoulder and many scenes at will. Orders of 200 pieces or greater are eligible for sea shipping. 100% guarantee for quality.