When do you need a laptop bag? If you spend a long time outside then you require it. To defend your laptop in travel use a bag. While you can’t carry a heavy backpack then a bag will help you. A laptop bag should be weather resistant. Lightweight will be more comfortable than any weight. The basic difference between a laptop backpack and a laptop bag is-

• A laptop bag is the smallest version of a laptop backpack.
• In a backpack to carry a laptop, you should use an extra case, while a bag has this.
• But some exclusive backpacks have safe compartments to hold laptops safe. the 

A laptop bag is a personal item. This is smaller than a carry-on bag and quietly fits under the seat in front of you. 15.6 inches is the accurate size of a laptop bag. Ignore keeping heavy things on the laptop bag. Everything except distilled water will destroy laptop bags. Any type of liquid can damage your laptop. So, be aware before cleaning a laptop and its bag also. 

All features and brands are almost done in the laptop backpack to laptop bags. Just variation insides and done function. That is why no suggestion is given here.