Mark Eden bust developer

The Mark Eden bust developer was a device and regimen sold by the Mark Eden company of San Francisco, California, that promised to enlarge a woman's breasts. Jack and Eileen Feather, California based figure salon entrepreneurs, were the promoters of the device. The product was widely marketed in women's magazines during the 1960s and 1970s, making claims such as, "For thousands, Mark Eden has transformed flat bustlines into firm, shapely fullness." Its makers withdrew the product from the market following their indictment for mail fraud.

The product consisted of a regimen of exercises using a clamshell-like device with a spring to provide resistance. The device and the regimen were never illustrated or described in the advertisements, which instead usually contained pictures of women showing their breasts. To the extent that the product had any effects at all, it worked by enlarging the pectoral muscles and latissimus dorsi, which could increase the circumference of the exerciser's bustline without actually enlarging breasts. Spokeswomen for the product included June Wilkinson, the Playboy centerfold, who appeared in one edition of the product's documentation.

Starting in 1965, the United States Postal Service repeatedly attempted to shut the Mark Eden business down, claiming that its advertising was false and misleading. The Postal Service first ruled that the claims made for the Mark Eden bust developer in its advertising constituted mail fraud in 1966, ruling that the claims made in the original Mark Eden advertising "far exceed puffing", and that the advertisements contained "material misrepresentations", given that "(t)here is substantial evidence that the representations as set out in the attached copy of the advertisement involved in this case are false;" and "(t)hey are the kind of representations that would invite women to buy the device."

Protracted litigation between the Mark Eden business and the Postal Service was the result, leading to a consent decree and a modification of the language of the advertisements, which the Postal Service later claimed had been violated. The Mark Eden corporation then brought suit against the Postal Service, and won an injunction forbidding the Postmaster from impounding the device and funds received from its sale; this decision was affirmed on appeal in 1970.

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