A casual yogi, you’ve never gone for the monopurpose wardrobe. To you, flexibility means, “I can wear these on the street after class and not feel like a misplaced hippie.”Lunge for multifunctional activewear pieces from Play by Sarah Reilly. Her pedigree (Parsons, J.Crew, and Madewell) accounts for the small collection’s clean lines and body-conscious-yet-demure cuts. Color is kept to a minimum (jet, coal, olive, and natural white); the organic cotton and bamboo jersey fabrics breathe (very important in yoga) and wick away moisture.There are old-school drawstring bike shorts and leggings with gusseted seams and flattering wide rear waistbands. Slim-fit tanks and onesies have built-in support and intriguing necklines (deep scoop down the back, double V with crisscross stretch grosgrain straps). Off the mat, Reilly’s cowl-neck LBD charms with its wide obi belt, midthigh rise, and jersey fabric that hugs all the right places. The lined fleece hoodie with skewed zipper is acceptably punk/bedouin chic, and a jumbo-size racer-back tank with anatomical spine print makes our creepy side smile. Available online at playbysarahreilly.com, $48-$268. Photo: Courtesy of Play by Sarah Reilly You’ve got the gear. Now get in shape.