Hard to describe.A web belt is made of webbing, that manufactured material used by military troops and boy scouts for belts and to hang their equipment from. Male dancers use web belts to hold up their tights.
Personally, I've never been a fan of web belts, because they have no give. It is much easier to buy enough 1" or 1.5" elastic to go around your waist from your local fabric store, then stitch it together into a belt yourself.[/i]