The layers you wear underneath your snow jacket or snow pants serve a couple of important functions such as insulation and moisture management. The primary purpose of layers is to provide insulation, which helps to keep your body warm in cold and snowy conditions. By layering your clothing, you trap air between each layer, which acts as insulation and helps to retain your body heat. In addition, snow sports can be physically demanding, which means you are likely to sweat while skiing or snowboarding. The layers you wear underneath your snow jacket and pants are designed to wick away sweat and moisture from your skin, keeping you dry and comfortable. When layering for snow sports, it is important to use a base layer against your skin, a mid-layer if it’s cold and an outer layer to protect you from the wind, rain, or snow. The base layer should be made of moisture-wicking material, such as synthetic fabrics like polyester or merino wool, and should fit snugly against your skin. The mid-layer provides insulation and can be made of materials like fleece or down. The outer layer should be waterproof and windproof and should provide protection from the elements. By layering appropriately, you can stay warm, dry, and comfortable.