A sustainable dye system that uses minerals transform these 100% organic cotton tees into styles that are not only colorful and one-of-a-kind but also affordable.4.5-ounce 100% organic combed ring spun cotton 30 singles This product's carbon footprint has been measured and reduced through a combination of preferred materials and investing in carbon offset projects though the ClimeCo Certified Product Program1x1 rib knit neckShoulder to shoulder tapingSide seamsTear-away labelThe mineral-dying process infuses each garment with unique character. Please allow for slight color variation in production and washing.