Engel 70% Organic Wool 30% Silk Baby Shirt Long Sleeve Buttons on The Shoulder 70% Organic Merino Virgin Wool and 30% Mulberry Silk Made from unique blend of Merino wool and silk will keep baby warm in cooler weather. extremely warm and comfortable With mother-of-pearl buttons on the shoulder. Certified by GOTS (Global Organic Textile Standard) Made in Germany.