Lululemon Runder Under Longsleeve Shirt Sz 10 Why we made this We like to mix things up, in our workouts and in our closet. That's why we designed this soft base layer to be reversible. We made it out of inherently wicking Running luon and gave it flat seams so it sits comfortably against our skin, no matter which way we wear it. Key features reversible for two looks in one supersoft Running luon (aka Rulu) is inherently moisture wicking contoured hemline with bum coverage flat seams won't rub you the wrong way - give chafing 'ell! no need to fiddle, thumbholes help keep your sleeves down while you run Tech specs designed for: run fabric(s): Rulu™ properties: reversible, moisture-wicking, flat seams, chafe-resistant fit: fitted length: hip