Bandier, a hot activewear store in Manhattan’s Flatiron District, has branched out into e-commerce at

The site will carry more than 40 brands and nearly 400 stockkeeping units, with an emphasis on emerging brands such as Ultracor, Michi and the U.K.-based Human Performance Engineering and Varley.

Founder Jennifer Bandier first dipped her toe in the retail waters with a temporary 1,200-square-foot door in Southampton, N.Y., last summer, which exceeded sales goals by 50 percent.

“Southampton was the test market,” Bandier said of the temporary location, which will reopen again next month. “I knew that if it didn’t work there, it wouldn’t work anywhere.”

The summer boutique sold 9,000 units and stock turned two-and-a-half times over a three-month period. The 2,500-square-foot location at 21st Street and Broadway opened in November, and another one to two doors are expected to open by year’s end.

In the next 12 months, the company predicts sales will hit $10 million, with 20 percent of that coming from Forty percent of the business comes from emerging brands, and leggings currently comprise 45 percent of all sales. The average price point is about $100, with items ranging from $64 to $78 for Phat Buddha or Zara Terez leggings and more than $400 for performance tights from Lucas Hugh.

“Within that pyramid, we have a high-low philosophy,” said Jayne Harkness, Chief Merchant at Bandier. “There are $60 leggings and the high [end]. It’s very inviting.”

In addition to emerging brands, Bandier also serves up activewear staples such as Nike, Under Armour and Y-3 and Stella McCartney for Adidas. The limited-edition Nike City Pack sneaker collection hit the store on April 11 and the vast majority of shoes sold out within hours.