It is a garment designed to be worn around the waist and lower body, advertised with features and benefits such as:
Purpose: Aims to help "Burn grease! Slimmer! Healthier!".
Material: Made from "Soft and comfortable fabric".
Design: Offers "Moderate elasticity, no rebound and no deformation".
Functionality: Designed for "Sweat absorption and ventilation".
General Use: Waistbands can serve various purposes, including limiting abdominal expansion, encouraging mindful eating, promoting good posture, or providing an immediate slimming effect, similar to a corset or waist cincher.