4.5 oz./yd²,, (US), 7.5 oz./L yd (CA), 60/40 ringspun cotton/post-consumer recycled polyester, 30 singles; Preshrunk fabric; 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;