PARIS — Tanya Heath is on a double mission: to prove women can wear heels without ruining their feet, and that her answer to their plight, a heel that switches from high to low, can be made entirely in France.
The Paris-based Canadian started with a simple idea. When your shoes start to hurt - half way through a party, a wedding or a workday - press a button in the sole, slot out your dressy high heel and replace it with a walking version.
"I'm a feminine feminist," is how the 42-year-old sums up her philosophy. "My shoe is designed to be sexy - but on the woman's terms."
"You can do your two-hour meeting, and then you just take off your high heel," she explained at the Ethical Fashion Show in Paris this month. "You're getting relief - and you're getting home."
So far so good, except the trick - which no one had quite figured out until now - is how to keep the shoe balanced and comfortable both on tip-toe and when you tilt it back to sit on a low heel.
Fruit of three painstaking years of research, Heath's patented answer to the riddle is billed as the world's first multi-height heel, a luxury leather shoe that switches seamlessly from nine to four centimetres (3.5 to 1.5 inches).
From pastel pink patent sandals to strappy dancing shoes or demure lace-ups, with either stiletto or chunky heels, high or low, the shoes are pitched at the high end of the market, starting at around 250 euros (320 dollars).
With models harking back to the 1920s, Heath wanted a "deliberately nostalgic" style to offset the "gee-whizz technology".
"It's an incredible game of geometry," she said. "All shoes, quality ones, follow a set of geometric rules, and always have done. I don't follow those rules. We did things differently."A woman shows a multi-height shoe with changeable heels, created by Canadian born shoes designer Tanya Heath. — AFP Photo
A passionate heel-wearer, Heath's project was born partly of personal experience, having suffered foot deformations from heels, like an estimated 38 percent of women worldwide.
"I had had enough of aching feet, and I refused point blank to wear ballerina flats," she joked. But she she also wanted to show shoes could still be made in a high-cost economy like France.
In 1996, Heath left a job as policy analyst at the Canadian foreign ministry for a new life in Paris, following her oil executive fiance, a "camembert and champagne" lover who refused to be based anywhere else.
Once there she learnt French at business school, worked in management and high-tech, then private equity, all while raising three young children.
In 2009 she quit her job and threw herself into the heel project, heading to the Dordogne to investigate taking over a struggling shoe factory as a way to kickstart the project.
When she got there Heath was in for a shock. "I saw the factory closed down and 52 people out on the street, the boss locked out - and I thought 'Woah!'
As a liberally trained economist, she had two ways of reading the situation.
"One is that France is non-competitive, and we deserve everything we get because we've killed the industry. And the other way is to say maybe, with an innovation, we can save some jobs here.
"I thought screw the liberal economics, we'll go for the innovation theory."
The buyout idea came to nothing, but she went on to surround herself with a team of 21 engineers, designers and technicians, plus herself and an associate, to bring her concept to life.Multi-height shoes with changeable heels. — AFP Photo
The resulting shoe is entirely made in France, with leather from central Limoges, produced in three factories, in eastern Franche-Compte for the mechanism, western Cholet for the heel and northwestern Rouen for the body.
Since they started shipping in February, Heath has sold 800 pairs via a retail corner in the Printemps department store, her website, the Sarenza online store, and half a dozen boutiques across five countries.