If you see it in summer, there are generally the following possibilities.

1. Invisible belt. A girl likes to wear a slightly thicker invisible belt around her neck.

Purpose: To fix underwear, which is more suitable for wearing suspenders or overlapping shoulders.

Some girls have a tie around their neck when they buy underwear. This kind of underwear is more suitable for young girls.

Applicable people: girls with average chest size and quite tall and straight. If the chest is too small, it is more obvious to wear this kind of underwear. If you wear this kind of underwear, your chest will sag and swell.

3. Chinese pocket vest.

4. Neck vest, beautiful, no other meaning.