The Theory Floral Lace Midi Skirt features a pull-on design with a delicate floral lace overlay and a flattering A-line silhouette for a refined, feminine look. The Theory Floral Lace Midi Skirt features a pull-on design with a delicate floral lace overlay and a flattering A-line silhouette for a refined, feminine look. Established in 1997, New York-based Theory creates cool, expertly tailored clothing from the finest materials designed to inspire how you feel, work, and live.