Elsewhere in the sportswear category, Tory Burch last week announced plans to enter the men's business, and high-end athletic wear brand Lululemon is also putting a larger focus on men's.
"Recognizing that brands are looking for growth and traditionally have been looking for growth in all the wrong places, well now they're looking for them in all the right places," said Marshal Cohen, chief industry analyst at The NPD Group research firm.
Read MoreMeet the YUMMY's, luxury's next great hope
According to a 2013 study by Bain & Company, men make up about 40 percent of the luxury market—and this demand continues to grow. The consulting firm said that menswear had a compound annual growth rate of 7 percent from 2010 to 2013, compared with 4 percent for women's.
What's more, Cohen said men's growth has outpaced women's two years in a row. That has only happened two other times in the past three decades, he said.
Citi analyst Oliver Chen said the movement toward men's luxury started in Asia, where more males use handbags and tend to be more fashioncentric.
But the trend is shifting to the U.S., where there has been an increased interest among men to look tailored and polished, and dress in more preppy and traditional styles. Grooming among men has become more important as well, Chen said, tying the shift to the economy.
Cohen added that men have recently been updating their wardrobes with "greater gusto" than women, as innovations in style and fit have made it a must.
"The metro-sexual, that cliché from 20 years ago, is now becoming a commercial reality," HSBC said in a report.