A great camera bag should keep your gear protected and in place—ideally with adjustable internal dividers to customize your layout. Extra space for accessories, snacks, or a jacket is a plus.
For reference, staple lightweight mice such as the Logitech G Pro X Superlight 2 and Glorious Model O 2 weigh 60 g and 68 g, respectively, but don't feel any studier than the Burst II Air.