5 oz., 57% cotton, 38% rayon, 5% Spandex; Lightweight performance fabric; Crewneck; Four-way stretch, designed for movement; Raglan sleeves; Retains shape over time; Retail fit; Side-seamed; 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;