The ELLA headband is made of 100% extra-fine organic merino wool - GOTS certified. That’s why Oh Chapô offers a cuddle guarantee for warm ears. The high-quality wool is also temperature-regulating, pill-free, and the headband grows with your child, so you can enjoy your favorite piece for a long time. Details about the cuddly soft wool: from controlled organic animal husbandry mulesing-free sustainably dyed yarn chlorine-free bleached family knitting in Slovenia Fit: S- approx. 6-24 months M - approx. 2-6 years L - approx.7-99 years of production: this headband was produced fairly and sustainably in Europe