READ: Your Guide To The Layering System
The real genius is in the construction. The best ones use a gridded fleece fabric on the inside; those channels are fantastic for pulling moisture away from your skin as you build a head of steam. That deep chest zip is the key feature—it’s a massive vent you can use to dump heat instantly without breaking your stride. Because there’s no full-length zip, it sits smoothly under a climbing harness or a pack’s hip belt without bunching up. For fast-paced hiking and climbing, it’s the intelligent choice.
Take a look at the options. Getting the right half-zip fleece makes all the difference when you’re on the move.