437 The Essentials Short in Gray 82% recycled polyester 18% spandex. Machine wash cold. Pull-on styling. Moisture-wicking. V-dip back. Soft activewear fabric. 437F-WF11. ACBO1301. 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: gray