4 5 oz /yd² (US) 7 5  oz /L yd (CA) 100% ring spun cotton Sport Grey is 90/10 cotton/polyester Dark Heather & Heather color are 65/35 polyester/cotton Softstyle& 39 s high stitch density soft ring spun cotton and cotton blend fabric offers a smooth printing surface Semi fitted Narrow width rib collar Taped neck and shoulders for comfort and durability Side seams Tear away label Gildan partners with Better Cotton to improve cotton farming globally Made with OEKO TEX certified low impact dyes div div span style text decoration underline strong This product meets the following Sustainable Style subcategories /strong /span /div div br /div div Sustainable Manufacturing This product meets the OEKO TEX Standard 100 /div div br /div div 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 Fair Labor Association and was made in a facility that is WRAP certified /div /div