100% combed ring spun "Softstyle" cotton (except RS Sport Grey: 90% cotton / 10% polyester). Stitched knit. Ribbed collar. Reinforced button placket with 2 tone-on-tone pearly buttons. Double-needle hem finish on sleeves and bottom of garment. Side seams. Detachable label. Certified STANDARD 100 by OEKO-TEX® No. 68255, OeTI. Pre-shrunk cotton: durable wash after wash. Soft touch and comfortable to wear. Detachable label, easy to re-label.