5 oz., 57% cotton, 38% rayon, 5% Spandex; Lightweight performance fabric; 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 Plant with Threadfast program;