Most base layers are built for the gym and it shows. Plasticky fabric, a fit that grips every part of you whether you want it to or not, and a collar that collapses the moment you layer anything over it. They function fine under a hoodie on a training day and look completely wrong under a shirt, a knit, or anything you’d actually wear out in the world.

What we were looking for here is different. Long sleeve layers that do the thermal job without announcing themselves, that sit flat under a blazer, that have enough structure at the neck to look considered rather than accidental. Fabric matters enormously. The best options in here use merino or a refined cotton blend that breathes properly and doesn’t pill after four washes.

These work for travelling, for layering through winter, for the office when the heating is unreliable. They are not afterthoughts. They are the thing that makes everything worn over them look better.