The Ferris Corset Waist was often stiffened by channels of cording, rather than exclusively by steel bones. In its day, it was a sort of “reform” or “good sense” garment, more flexible and less rigid than the usual boned corset. Nevertheless, it’s dismaying to read:
The girls at the bottom seem to be teens. The one at left appears to be leaning forward while using some kind of exercise equipment.
In this ad from 1910, Ferris assured buyers that their products were made “under the cleanest conditions.”
However, this Ferris maternity corset from 1910 does show fashionable constriction of the waist:
“Good sense” or not, corset-wearing started early:
Those hose supporters (stocking suspenders) are really long!
You can read more about the Ferris Brothers here.