Gym Girl Skirt - Fits smallerGym Girl Skirt Size note: This production of Gym Girl Skirt prints run slightly smaller than usual. Our advice is to size up. It all started on a training run in 2004 In early 2005 at a marathon expo in Austin, TX, this skirt launched the Skirt Revolution as the first skirt targeted toward runners with built in shorts that didnt ride up. The first prototype was made from silky, quick dry swimsuit fabric from a closeout mill, with lightweight nylon