When it's really cold outside, just wearing one big coat may not be enough to keep you warm. But if you wear too many coats, you'll get too hot and uncomfortable. So, what do you do? You wear layers!
Layers are like building blocks of clothing, and each layer has a special job to do. The first layer is called the "base layer" or "long underwear." It fits snugly against your skin and helps to keep your body heat in. It also wicks sweat away from your skin so you stay dry.
The second layer is called the "insulating layer" or "mid-layer." This layer helps to trap heat and keep it close to your body. It can be a thick fleece, wool sweater, or down jacket.
The third layer is called the "outer layer" or "shell." This layer protects you from wind, rain, or snow. It should be made of a waterproof, breathable material. It can be a parka, coat or rain jacket.
So, when you're getting ready to go outside in the cold, you'll want to put on your base layer, then your insulating layer, and finally your outer layer. This way, you can adjust how warm or cool you feel throughout the day by adding or removing layers!