British madcap Vivienne Westwood, emerging French designer Anne Valerie Hash and Belgian design duo AF Vandevorst fielded their most commercial, most accessible lines, which were full of casual layered styles in light knits that looked like something someone would actually wear.
Known as Paris Fashion Days, the weekend event was aimed at giving the second lines -- which have long been seen as ready-to-wear's ugly stepsister -- a high-glamor patina.
"Before, designers were almost embarrassed by their second lines," said Muriel Piaser, exhibitions director at Pret a Porter Paris, which organized the two-day long event, held in a marble hall at Paris' former stock market.
"In today's economic climate, that kind of attitude is no longer possible because the client has changed," she said.
"Designers are now recognizing that they can use their second lines, with much lower price points, to promote top ready-to-wear lines."
That was the case with Hash, who launched her second line, AVH by Anne Valerie Hash, with a catwalk show instead of fielding a haute couture show later in the week.
"For a small company like us, it wasn't financially possible to do both," Hash said.
"We needed a line that would boost the main ready-to-wear line, something inexpensive that would tap into the energy of streetwear."
She served cuffed shorts paired with tanks and cardigans and elegant draped pantsuits in feather-light knits.
The collection, to be manufactured in Eastern Europe, captured the relaxed Parisian chic that has become the trademark of both Hash's ready-to-wear and couture lines.
Knitwear was also at the heart of A. Friend, Vandevorst's lower-priced line.
The design duo layered knit tankdresses and cowl-neck sweaters over slouchy, drop-crotched leggings.
For Anglomania, Westwood delivered swingy dresses with wasp-waisted bustier-belt hybrids and skintight jeans and sleeveless vests in metallic denim.
Paris Fashion Days later opened its doors to the public, with runway shows by smaller, lesser-known labels including Pablo, French label Gerard Darel's second line.
The second lines, with their low price points and mass-market appeal, were at the opposite end of the spectrum from couture collections -- where designers showcase their savoir faire with hand-sewn, made-to-measure gowns that cost as much as a car, or even as much as several cars.
The higher-profile Paris' haute couture extravaganza started last week, with luxury supernova Dior's ever-sumptuous, media-saturated display.