Base layer: A good set of thermals is essential in the fight against cold, especially when you’re working hard. The best fabrics wick away sweat as you heat up, which helps regulate your temperature. Merino wool is the best at this, but also the most expensive. Synthetic fabrics are getting better though, and please avoid cotton at all costs, as it gets wet and stays that way, making you cold and uncomfortable.
Mid layer: Whether you choose a hooded fleece or puffer-style jacket, this layer does the bulk of the work in cold conditions. Combined with the base layer, it traps warm air in, while also allowing moisture to be expelled. Synthetic insulation such as Primaloft Gold is brilliant, and doesn’t lose its properties if it gets wet. Down jackets offer the best warmth to weight ratio, but they don’t pack down as small, and should never get wet. A fleece with an insulated vest…
