A girdle is a great device, being elastic, to improve ones figure, especially reducing ones waist. Although I have a waist cinch which is made of fabric and lightly boned, often I wear a panty girdle instead because it is easier to put on since, though it doesn't reduce my waist as much as the cinch does, it doesn't require having to be tightly laced.
A girdle is a garment that encircles the lower torso, perhaps extending below the hips, and worn often for support.
Did you ever hear of Spanx? Well, a girdle is kind of like that...spandex, elastic, underwear or for weight, thighs, where ever you want to look thinner...sort of compresses the fat so you can take inches off. Great idea, I think.
Its like underwear for your waist
A thing fat girls wear 2 look smaller at the waist