Dynafit Alpine Long Sleeve 1/2 Zip Tee <tc>Men</tc>

This shirt feels light and soft, with surprising warmth for such a thin layer. Thanks to the tight, athletic fit, it hugs your body well and stretches with every movement. You won't feel any chafing seams, even under a backpack or trail vest.

It performs best on cold days when your body temperature is constantly fluctuating. Think of a long winter run in the Veluwe, a trek in the Ardennes, or a mountain run involving a long climb followed by a descent. On a long climb, when you start to sweat, you will notice that it remains dry to the touch, and with the zipper open, you cool down quickly. When descending or taking a short break, you zip it back up to retain your warmth.

If in doubt, consider how and when you run. The fabric is very breathable, so you will need a jacket over it in wind, rain, or when standing still for long periods. Above around ten degrees, it quickly becomes too warm for most runners. If you prefer a looser fit, the athletic cut may feel tight.

In short: a warm, breathable layer for cold runs, best in combination with a jacket.