Theory Basic Pull On Pant in Yellow. - size 2 (also in 0) Theory Basic Pull On Pant in Yellow. - size 2 (also in 0) 62% linen 36% viscose 2% elastane. Do not wash. Elasticized waist. 13 at the knee narrows to 11 at the leg opening. Imported. THEO-WP230. J0303201. Theory is a visionary concept for modern intelligent fashion forward people. Founded in New York and made by the finest of fabrics, this makes the working everyday person feel powerful, ready to face their day.