Merino wool is the most efficient material for cold weather. Merino wool is softer than regular wool, and it feels more like cotton against the skin. Merino wool resists wind and warms better than synthetic materials. It doesn’t absorb odors and it regulates body temperature. It is also produced in a sustainable manner.

The jacket pictured here is the Smartwool Yampa Jacket. It’s designed with a woven wool sueded fabric, and it has a heavy 100% merino wool lining. There is a women’s version of this jacket too. Smartwool sells a whole range merino wool clothing, including summer wear. Merino wool clothing tends to be expensive, but you can find Smartwool at Altrec.

Merino wool is an optimal green material for use in winter. In contrast to most other synthetic materials that are commonly used to make winter garb, it is quite sustainable. It’s softer than regular wool, resists wind, regulates body temperature, and warms better than synthetic material. Some good maker of natural merino wool clothing are Smartwool, Patagonia, Ibex and Icebreaker (pictured here).