Flex All Day, a new athleisure boutique, just opened its doors at the Wildwood shopping center. In the onetime Blanca Flor space next to Bluemercury, you’ll find brands like Terez, Beyond Yoga, Goldsheep, Year of Ours, Alo and Spiritual Gangster. Owner Sydney Rosenberg, who previously operated pop-up shops in Chevy Chase and Georgetown, says she’s always dreamed of opening a brick-and-mortar store. “For me, there was a silver lining of the pandemic,” she says. “Everyone changed their wardrobe from workwear to athleisure and activewear.”