Whether a laptop bag is waterproof depends on the specific bag you're referring to. Some laptop bags are designed to be waterproof or water-resistant, meaning they provide some level of protection against water getting inside and damaging the contents. However, not all laptop bags offer this feature. You'll need to check the product specifications or descriptions provided by the manufacturer to determine if a particular laptop bag is waterproof or water-resistant. If you're unsure, you can also consider contacting the manufacturer directly for more information.