You should choose bag which it is including. And you can find in there.
date：15-04-14 source：http://www.avatarbag.com click on：2215
Is it Comfortable to Carry?
When you often have long distance walks, you need to see to it that the backpack is appropriate. Make sure that that the straps or the harness system is strapped and ventilated. This will make you more comfortable without the sweat. You may also opt for a wheeled laptop bag to overcome the strain as you rush to the airport, getting a taxi, or just simply when you are loaded.
Is it Safe from Hard Impacts and Knocks?
When buying a backpack for laptop, see to it that it has specific protection for your device. Foam padding or compressed air is an ideal consideration for a backpack that provides ample protection knocks or hard impacts.
Is it Water Proof?
Traveling outside means getting yourself caught in bad weather conditions, have something spilled, or drop your bag in one of the puddles. See to it that your backpack is either water-proof or shower-proof to keep these damaging elements at bay.
Does it Look Good?
After sorting out the important and practical considerations, you may now consider the overall look of the laptop backpacks. Your personal taste matters but it’s also important to consider how other people see you. When you go out for a rugged business, a rugged-looking one is good but when you wear corporate attire, a more formal one is great.