Thermal underwear

A base layer is the foundation of the whole layering system. The layer against your skin isn't just for warmth - above all it moves moisture away: if sweat stays on your skin, you chill the moment you stop moving. That's why warm clothing starts with the right base layer. Choose merino wool for warmth when damp and better odour control on long hunts, or synthetic thermals for fast moisture wicking and an often more affordable option. Choose heavier layers for winter and lighter ones for milder conditions. Build up from the base with fleeces and jackets.