5 oz., 57% cotton, 38% rayon, 5% Spandex; Lightweight performance fabric; More Sustainable Cotton: Threadfast is a proud member of the Better Cotton Initiative (BCI). ; Cotton products from Threadfast support more sustainable cotton farming. Better Cotton is sourced via a system of mass balance.; Designed for movement; Retains shape over time; Side seam ; Tear away label; Threadfast is a proud member of the Better Cotton Initiative (BCI). Cotton products from Threadfast support more sustainable cotton farming. Better Cotton is sourced via a system of mass balance.; Every Threadfast product contributes to the ìPlant with Threadfastî program. Learn more at threadfastapparel.com/plant-with-threadfast;