This is an ad for corsets from a 1934 catalog by National (a mail-order company).

(click on the image for full size)
The text reads:
Silhouettes are made… not born
That is the Marvel of Modern Corsetry!
You will have lovely curves youthful bust If You Wear This Foundation!
Gently Molds the Figure to a Sleek… Graceful Smoothness $1.98
Fits figures with hips 3 to 6 inches larger than bust.
Whether you’re just a “wisp of a thing” or need rigid control, this garment is an excellent foundation for the 1934 fashions. Concealed boning over the diaphragm gives you a nice flat “tummy”; elastic inserts at the sides mold your hips and thighs… and a special insert at the bottom takes up the strain when you bend. Rayon-figured Cotton Poplin with Rayon-and-cotton Jersey bust section. Wonderful for only $1.98
Tearose or Pink. Sizes: 32 to 44 bust. Shpg. wt. 1 lb. 2 oz. $1.98
Skinlike Lastex Foundation
You never felt such freedom
You’ll look pounds slimmer
So comfortable you’ll never know it’s on! $1.98
Not even the tiniest bulge will show after you have put it on!
Fits figures with hips 3 to 6 inches larger than bust.
“Skinlike” takes every little wayward bulge and puts it firmly in place. “Skinlike” moulds to your figure into a smooth, unbroken line, straight hips, small waist – and mind you, there’s not a bone in it. Two-way stretch Lastex right to the bust-line “does the trick”, and above that it’s softest mesh and definitely shaped to give you bosom that new uplift look. For that slim, supple, youthful look, wear “Skinlike.”
Colors: Tearose or Pink. Sizes: 30 to 38 bust. Shipping weight, 10 oz. $1.98
Backless
Boneless
Hookless
Won’t bulge
Won’t ride up
Lastex foundation
The Smart 1934 Contour… from the uplifted bust to the flowing back line… $1.98
Fits figures with 3 to 6 inches larger than bust.
Rayon-Brocaded Poplin front with the new pointed bust. Two-way stretch Lastex back to assure smooth hips and thighs and a nice flat seat. It’s backless for evening frocks. It’s boneless, yet it gives all the necessary support to the figure, and is absolutely guaranteed not to “ride up.” Shoulder straps are elastic.
Tearose or Pink. Sizes: 30 to 38 bust. Shipping weight, 10 oz. $1.98
This ad just made me laugh with all of it’s assurances that the corsets are super comfortable, but also capable of totally reshaping your body and making you appear magically thinner! I’m sorry, but corsets don’t work that way. Not that they can’t be comfortable, because they totally can, but if it’s really a corset, you absolutely know that you’re wearing it. Anyway, I thought it was interesting. I have a few more corset ads (and a bunch of ads for other stuff) from the same year that I’ll post in later weeks that are also interesting for other reasons.