What is that little bag that is tied around the waist called?

Bum bag.

A waist bag is a kind of bag that is fixed on the waist. The waist bag is small in size. The shape of the waist bag changes with the functional requirements of the waist bag. The material of the waist bag is often made of leather or synthetic. Made of fiber, printed denim, etc., the colors of the waist bags are mostly a combination of achromatic and colored or colored gray. It can be used for traveling or daily life.

Extended information:

Tips for maintaining genuine leather bags:

1. Leather bags are most afraid of becoming hardened when exposed to moisture and the leather surface is scratched accidentally. If your bag is stained or soaked in water, wipe it dry with toilet paper or a towel as soon as possible and then blow dry it with a hair dryer at low temperature.

2. If you use leather cleaner to clean leather bags, the lens cloth generally used for wiping glasses is a cheap and easy-to-use helper. It will not scratch your beloved bag, just apply it evenly. Restore the shine to your bag.

3. Store it in a dust-proof bag when not in use. After cleaning, it is best to wrap it in a plastic bag or plastic wrap and put it into a dust-proof bag. Even if you don’t use the bag for a long time, you can occasionally take it out to pass. Breathable and airy.

Baidu Encyclopedia - Waist Bag

People's Daily Online - How to clean and maintain leather bags? A few tips to ensure your bags look like new