4.5 oz./yd² (US), 7.5 oz./L yd (CA), 100% preshrunk ring-spun cotton jersey, 30 singles; Heather Grey is 90/10 cotton/polyester; Modern fit; Narrow, set in 1x1 rib collar; Self-fabric shoulder to shoulder neck tape for added comfort; Double-needle sleeve and bottom hem; 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.;