437 The V Legging in Black 82% recycled polyester 18% spandex. Machine wash. Pull-on styling. Elasticized V-waist design. Back printed logo. Midweight activewear fabric. Item not sold as a set. 437F-WP1. ACBO1060. About the designer: 437 is a Toronto-based activewear brand founded by Hyla Nayeri and Adrien Bettio and run by an all-women team.