Merino wool is a fantastic material to wear next to your skin: it's able to miraculously regulate temperature, doesn't itch, doesn't stink even after days of wearing, and is breathable. Merino garments may be more expensive than those made from synthetic materials are absolutely worth the expense. Here at addnature, we stock a wide range of longjohns or long pants made from merino wool for really cold days to be worn under other trousers. These are both great for strenuous outdoor activities under technical trousers or wearing about town in deep winter under jeans.