Compressport 3D Thermo Winter Top Men

This base layer feels soft, warm, and form-fitting. The merino keeps you warm, and the seamless construction ensures nothing chafes, even under a cardigan or coat. The high collar keeps cold wind off your neck, and the half-zip lets you control how much airflow you need.

It performs best on cold days when you are working hard. Think of interval training in freezing temperatures, a winter endurance run in the Veluwe, or a long trek in the Alps where you wear a jacket over your base layer. After a climb, when you start to sweat, you notice the difference: the mesh zones under your arms and along your back dissipate heat, while your chest and arms stay warm. If it gets too warm, simply open the zipper. In the final hours, the back support provides extra stability when you start to tire.

If in doubt, look at the temperature and your pace. This is a medium-weight layer, so above a few degrees above zero you will quickly get too warm. In wind or rain, you will need a jacket, as the shirt itself does not keep out wind or water. If you enjoy running in the winter cold and need a layer that works for you, then this is a strong choice.

In short: a warm, breathable base layer for hard training in the cold.