6.5 oz./sq², 100% ring-spun cotton, 24 singlesHeather Grey is 90/10 cotton/polyesterTextured, heavy weight ring-spun cotton piqueRelaxed fitRib mock neck collarTaped neck for comfort and durabilitySide seamsRecycled tear away labelAmerican Apparel partners with Better Cotton to improve cotton farming globallyMade with OEKO-TEX certified low-impact dyesThis product meets the following Sustainable Style subcategories:Sustainable Materials: contains 100% BCI cotton Sustainable Manufacturing: This product meets the OEKO-TEX Standard 100 Socially Conscious Manufacturing: This product was made in a facility that utilizes the Higg Index and has implemented Level 2 practices or above, was made by a mill who partnered with Better Work, Fair Labor Association and was made in a facility that is WRAP certified.