100% cotton. (Heather Grey: 97% cotton / 3% polyester). Quilted cotton. Side seams for a feminine, fitted fit. Narrow placket with two tone-on-tone buttons. Side slits. Certified STANDARD 100 by OEKO-TEX® No. 08-5295, Shirley. Soft and resistant fabric. Easy to maintain. Smooth surface ideal for printing. Colored laundry that withstands 40°C Normal programme|Bleaching not permitted|Dry cleaning not permitted|Iron at medium temperature|Tumble drying not permitted