4.5 oz./yd², 60/30/10 recycled polyester/US grown ring-spun cotton/rayon The polyester content is currently transitioning to CiCLO® polyester Modern fit Clean Canvas Technology for superior printability 1x1 ribbed, lay-flat collar Self-fabric neck tape for comfort 40+ UPF rating Black tear away label This product meets the following Sustainable Style subcategories - Sustainable Materials - Contains 60% recycled polyesterSustainable Manufacturing - This product was made in a facility that is run by at least 50% renewable energySocially Conscious Manufacturing - This product was made in a facility that utilizes the Higg Index and has implemented Level 2 practices or above, and was made by a mill that has partnered with or is accredited by the Fair Labor Association