There's no longer any shame in leaving the house in sweatpants. Fashion is finally taking activewear seriously, and how can they not when apparel sales from last year alone reached $206.3 billion? That fact becomes even harder to ignore when the top tier of celebrity musicians are cashing in on the industry. In 2014, Kanye signed to Adidas, Rihanna inked a contract with Puma, Beyonce started building her own brand at Topshop, and her sister Solange released her second collaboration with Puma. Not to mention, Adidas also tapped Pharrell Williams, Pusha T, and Rita Ora for capsule collections. But as more eyes are drawn to the activewear world, and big brands like Free People, The Gap, and Urban Outfitters capitalize on the trend with their own fitness offshoots, the emerging labels can be increasingly harder to find. So we sifted through the onslaught of workout brands, to bring you the ones worth following now.