Keeping warm in the coldest temperatures can mean the difference between getting outdoors and doing the things you love or nesting indoors. If you don’t want to miss out on enjoying a brisk winter day, all you have to do is bundle up in the warmest fabrics and brave the cold.

Wool

Wool is the best choice for outerwear in cold climates. Wool made from sheep, lamb, alpaca, or camel hair each have a different weight and feel and all offer warmth and comfort. Fine wool tends to be less itchy than coarse wool. Blends are not as warm as 100-percent wool, but the higher the percentage of wool in the fabric, the better.

Silk

Silk is an elegant fabric with a soft, draping texture. This natural fiber comes from the cocoon of the silkworm. It’s lightweight and adapts well to layering for additional warmth—perfect as a base layer against the skin, such as undergarments. Since the fabric absorbs moisture, it helps the body maintain an even temperature when transitioning between warm indoor and cold outdoor temperatures.

Flannel

Flannel is a knitted fabric that’s typically 100-percent cotton or a blend of various fibers. It’s usually thin enough to avoid bulkiness when layered, and it’s soft against the skin, making it a less expensive alternative to cashmere or wool. Some flannel clothing is made with a quilted backing for additional insulation and warmth.

Fleece

Fleece is a super soft, thick, yet lightweight fabric. It can be made from either cotton or synthetic material, with synthetic polyester polar fleece providing the best insulation. Polyester fleece wicks sweat away from the skin and has good thermal insulation properties, helping your skin breathe and stay comfortable in chilly temps.