Whoa. Workout leggings that cost US$320?

New York

FIRST there were the impossible-to-get-into US$40 exercise classes. Then came US$365 foam rollers and US$1,000 yoga mats. And now: US$320 workout tights you basically have to pass a background check to be allowed to buy. Of course, they're sold out.

No, you're not reading The Onion.

The matte black, logo-free leggings came to market in June, part of the five-piece first collection of a company called Wone (pronounced "won"), started by Kristin Hildebrand, a one-time fashion blogger and former global concept creative director for Nike. Each piece in the all-black collection (two sports bras, one pair of shorts, a sheer cardigan and the leggings) was numbered like a limited-edition lithograph, and they have all sold out.

To buy anything, hopefuls (who mostly heard about the brand by word-of-mouth) had to request access to the Wone website by clicking a button. Ms Hildebrand, 36, then Googled aspiring customers - "these people have fascinating lives," she said - before writing to some personally to grant them one-week access to make a purchase.

"I'm not trying to be exclusionary," said Ms Hildebrand, who got the members-only-buying idea in part from some boutique wineries near her home in Portland, Oregon. Her extreme "customer profiling", as she called it, is in service, she said, of making buyers feel important.

Who didn't make the cut? People who want to buy "five of everything," Ms Hildebrand said. "I get multiples of the bra or of the legging, but excessive numbers of the entire collection and I get sceptical." (She feared these people planned to resell at higher prices.) She also rejected anyone she suspected was buying to knock off her design, or for research. "I'll email them and say: 'Is this you on LinkedIn?'" Ms Hildebrand said. There is no actual rejection email; she just ghosts those she doesn't want to buy her wares.

Approved buyers talk about Ms Hildebrand's wares with the zeal of religious converts, or maybe just of people who've paid a premium. "A little slice of heaven," said Chloe Pacheco, 27, a paediatric nurse in Albuquerque, New Mexico. "They're like a second skin. I'm in love with them," said Melanie Palmer, 29, who works in sales and lives in Brooklyn.

Wone's leggings aren't the only ones that are hard to get. In December, the upscale London brand Lucas Hugh will begin offering leggings featuring a design that looks like the support tape physiotherapists use, in a limited edition of 20. Cost: US$250 apiece.

This past summer, Bandier, which sells designer active wear, quickly sold out of US$198 black Ultracor leggings printed with lightning bolts. The wait list topped 1,000, according to the company. The brand eventually was restocked in five patterns and special fits like a higher waist.

Jennifer Bandier, the boutique's founder, was not surprised. "The customer needs to feel like making a purchase is an experience and that what they are buying has a good story that they can share with their friends (and their social media followers)," Ms Bandier wrote in an email.

Wone's offerings also aren't the most expensive out there. Katie Warner Johnson, a founder and the chief executive of Carbon38, which sells fashion-forward activewear, said that women's willingness to pay about US$300 for Michi leggings was "essentially the foundation of our business".

One of the first items Carbon38 offered was a style called Medusa: a swirling patchwork of black spandex, mesh and heather gray fabric that made it look as if the pants were growing up the wearer's leg. And women were lining up for them back in 2014.

"We've been really able to play with the price spectrum since then," Ms Johnson said.

Elizabeth van der Goltz, the global buying director of Net-a-Porter, said the site was initially "nervous" to stock leggings over US$200. Now there are US$490 blue and black Fendi leggings printed with scribbled hearts and US$345 Lucas Hugh black leggings with opalescent tape stripes and pinhole mesh inserts for ventilation. These brands have "high sell-throughs", Ms van der Goltz wrote in an email.

What does US$300 and up buy you? In the case of Wone, not strategic colour blocking or extra ventilation. Instead, Ms Hildebrand touts personalised finishing and Italian and French fabrics, which cost US$20 to US$25 per yard, as opposed to the US$3 to US$4 for fabrics more typically used in active wear.

As opposed to the standard promise of holding up through 50 machine washes, Wone's are guaranteed through 50,000 washes - that's every single day for the next 136 years, or at least through your lifetime, no matter how much exercise might extend it.

Wone's social media strategy is also different from most brands': the company's lone Instagram post, for example, is of blank white space. "It's hard to be in health and wellness and advocate or even promote something that's sort of the antithesis of wellness," Ms Hildebrand said of the brand's tactic. "It wouldn't make sense from a philosophical standpoint."

Ms Hildebrand will also email customers at all hours, which might seem at odds with wellness. "I struggle with that," she said. "I'm trying to build this to a place where I can absolutely afford to limit my hours."

But not for long her customers: Barneys New York will begin selling Wone in December. NYTIMES