How did I miss this? SilkDamask.org:
"These red, silk satin French-made “barrette/Tango boots” are in the collection of the Bata Shoe Museum in Toronto (http://www.batashoemuseum.ca) and date circa 1910s-1920s. Even if you do not fancy dancing, they just beckon you to have some fun, don’t they? In order to dance the Tango, the shoe needed to be well-fitted and secure. The lacing, or barrette-style straps, run up the ankle (and often the calf, as in this example) adding a provocative, sensual twist – appropriate for the dance itself."Look at them! I don't have permission to use the image; if I can find a way of getting in touch, I will ask, and if it's ok I'll add it here. But comments are restricted, and I can't find an email.
Everything SilkDamask writes about the requirements for a tango shoe still applies; it must hold firmly to the foot, flatter the leg, look beautiful, be sensually pleasing, and fit well. They must also have a very flexible sole, on which the dancer can easily pivot. The fashion for heels is thinner, and the shoes themselves are generally less substantial.
These days we have numerous manufacturers to choose from, and they compete for the custom of serious dancers on comfort, fit, function, beauty, and to some extent price, although generally not on prompt delivery or reliable service.
I invite you to compare the Yeite glossy red by Balanceo, the Silver Ramona by Madame Pivot, and the Recoleta in purple polka dots by Regina. From the Argentine manufacturers, Fabioshoes make this rather gorgeous practice shoe. Comme Il Faut have continued to make their more extreme, colourful, elaborate and detailed designs, but are possibly collected as art objects about as often than they are used to dance in, at least nowadays in the European market.