Solid colors: 100% organic cotton. Ash Heather color: 98% organic cotton / 2% viscose. Oxford Grey color: 90% organic cotton / 10% viscose. Wine Heather, French Navy Heather, Green Marble Heather, Cloudy Blue Heather colors: 80% organic cotton / 20% recycled polyester. Grey Heather color: 70% organic cotton / 30% polyester. Combed cotton. Round neckline with rib binding and elastane. Matching tone undershirt band at neckline. Tubular cut. Double needle finish on sleeve hems and garment hem. Coconut Milk color care: this shade is obtained through a specific dyeing process that makes it more delicate than other colors. To preserve the shade, wash your garment at 30°C with gentle detergent and follow care instructions.