MINNEAPOLIS — As a bout of bitter and deadly cold sweeps the U.S., millions of Americans are being told to dress in layers if they must go outside.
In places that rarely experience such temperatures, that advice can be confounding. What does it mean to layer up? Is it different from just putting on a coat?
People in Minnesota, a state that is no stranger to the cold, have wisdom to share.
WHAT IS LAYERING?
Layering means wearing multiple pieces of clothing to keep your body comfortable in cold weather. Each layer creates an insulating pocket of air that protects you better than just wearing a big jacket, and layering helps move sweat and moisture away from your skin.
No matter how cold it is, you’re probably going to sweat when you go outside and start moving, said Claire Wilson, executive director of The Loppet Foundation, a nonprofit that promotes winter recreation and activities in Minneapolis.
If you’re wearing the correct layers, you can feel perspiration wick away from your body, she said. The idea is to add another layer if you get cold, or take off a layer when you get hot or wet.
AVOID COTTON AND WETNESS
Wilson said she loves to shop at thrift stores for layers that won’t break the bank.
“Just look for things that aren’t cotton,” she said.
Cotton absorbs moisture, so it stays wet longer, Wilson explained. Cotton socks can get wet in your boots or shoes if you walk in the snow, and a cotton shirt under your jacket can get wet with sweat. Cotton won’t dry quickly, so you’ll get colder, she said.
Instead, choose wool socks and fabrics made of fleece, polyester or polypropylene, she said. You can also repurpose old vests and shirts, which are great at keeping your core warm.
THINK OF THREE MAIN LAYERS
Wilson recommends starting with a base layer, then a mid layer, and then an outer layer.
The base layer is closest to your skin, so it’s important for the fabric to wick away moisture, she said. Choose polyester over cotton for this. Then, wear a mid layer — a vest or a shirt — to keep your core warm. Some people choose to wear more than one mid layer. Finally, wear a traditional winter jacket that breaks the wind a little but also insulates you, Wilson said.
PREVENT FROSTBITE
Frostbite — a painful injury in which skin freezes, blood flow decreases and tissue gets damaged — can happen within minutes in cold weather when skin is not adequately covered.
“We see people with frostbite inside their shoes and gloves all the time,” said Dr. James Miner, chief of emergency medicine at Hennepin County Medical Center in Minneapolis.
Symptoms include blistering of the skin, along with bruising and swelling. Frostbite can even result in the loss of a limb if not properly treated.
