The agency's quirky TV, radio and print ads for the company formerly known as Dial-A-Mattress have been praised by industry creatives. A spot in which delivery men for the service are met by an angry man in a squirrel costume waiting to hibernate in his basement won a Gold Lion in June at the International Advertising Festival.
Agency President Michael Dweck said "philosophical differences over direction" caused the resignation, but declined to elaborate.
1-800-Mattress is believed to be approaching agencies about taking over the account. Korey, Kay & Partners, New York, has already passed on pitching the business.
"They called out of the blue," said Korey Kay Chairman Allen Kay. "I told them that they are at a fine firm and to work out their differences [with Dweck]."
Luis Barragan, exec VP and general manager at 1-800-Mattress, could not be reached for comment at deadline.
Dweck & Campbell won the account in November 1997.
"We wanted to create something memorable," said Mr. Dweck. "Research said . . . there was no face behind the brand. We had to bring that product to life and bring a personality to that brand."
1-800-Mattress sales could not be determined, but one executive familiar with the company said sales are up over 40% in the first half of this year.
Dweck & Campbell's remaining clients include Comedy Central, Seagram Americas and Time Warner.