3.24 oz./yd², 100% acrylic knit; Navy/Charcoal & Royal/Charcoal are 77/23 acrylic/polyester; Heather White/Grey is 83/17 acrylic/polyester ; All other Heather colors are 55/45 acrylic/polyester ; This product meets the following Sustainable Style subcategory:Socially 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 in a facility that is WRAP certified.