"These are the first shoes in the world in 24-carat gold," he told AFP. "The particularity of these shoes is that gold is not simply applied, it is not like an accessory or a button. Gold is an integral part of the shoe".
Small strips of gold are woven by hand and sewn with leather to ensure the moccasin uppers are comfortable.
Vietri is just one of a wave of "Made in Italy" producers seeking to tap into the high-end Gulf fashion market, particularly in oil-rich states such as the United Arab Emirates, Saudi Arabia and Qatar.
His men's gold line was launched in 2016 "after eight months of studies and attempts," Vietri said. The women's followed this year.
"The difficulty was in finding the right balance between the strength of the gold and the flexibility of the shoe," he said.
"If the shoe is too light, the gold will bend. If the shoe is too heavy, it hurts."
Each pair of shoes, made with 230 grams of gold, is one-of-a-kind and is made to measure using 3D foot scanners.
They retail for up to 25,000 euros ($27,000) for the men's collection, and 30,000 euros for the women's line.
The price includes delivery by helicopter, and the shoes are presented in a black lacquered box.
Vietri also does a traditional line with prices starting at 250 euros, and another in which shoes feature designs by international artists.
The luxury collection features silk pumps embellished with gold or silver and customers can decorate their chosen model with pearls or diamonds.