437 The Essentials Legging in Purple 82% recycled polyester 18% spandex. Machine wash cold. Pull-on styling. Stretch activewear fabric. Pocketless design. Item not sold as a set. 437F-WP27. ACBO1274. About the designer: 437 is a Toronto-based activewear brand founded by Hyla Nayeri and Adrien Bettio and run by an all-women team. Color: purple