Your base layer sits next to your skin, managing moisture to keep you dry and comfortable. Merino wool or polypropylene are great options—they’re warm, breathable, and dry quickly to help regulate your body temperature.

A mid layer sits between your baselayer and outer shell to trap body heat. Choose wool for natural warmth and breathability, fleece for lightweight, fast-drying comfort, or a lightweight puffer for extra warmth.

An outer layer protects you from wind, rain, and whatever else the forecast throws your way. If your plans include rain, look for waterproof fabrics that'll help keep you warm and dry.