Merino and wool base layers, proven in shearing sheds. They manage sweat instead of holding it, and they don't go cold on you the moment you stop moving.
Tee
The 240 Tee
Men's Singlets + Tees
Classic Shearers Tee - 100% Wool
Classic Shearers Singlet - 100% Wool
Active Shearers Tee - Pure Merino
Active Shearers Singlet - Pure Merino