Eisbär's Merino products are made from 100% certified supreme extra fine pure virgin wool from organically farmed livestock (KBT, no-mulesing) and have undergone a chlorine-free treatment (EXP) and sustainable dyeing process. Merino is the natural high performance fiber – moisture regulating, thermoregulating, odor resistant, biodegradable and comfortable on the skin – there is nothing to add to nature.