Forwards. That’s where the Trail Breaker is engineered to go. Swiss-engineered for all-weather alpine adventure or wild runs pretty much anywhere, this lightweight performance running top is made to be the shield you need for running head first into adventure – whatever the weather forecast says.
It’s with this fearless forward motion in mind that the front panel and sleeves of the Trail Breaker features the most protective elements of its zonal fabric construction. The PFC-free water-repellent fabric feels like a force field against wind and rain and comes into its own on steep downhills where it acts as a barrier against the rush of fresh mountain air.
Made with the mountains in mind, the Trail Breaker is also developed to prevent you overheating when on tough ascents or longer runs where the weather improves. As a result, the fabric on the back of the top is a ultralight mesh that delivers increased airflow for ultimate breathable comfort.
In combination, this zonal system of a more protective front panel and the ventilating mesh panel on the back helps keep your temperature in the comfort zone, even if the weather, or your run, is pushing your limits.
When you’re out in technical terrain, details matter. So the team in the On Lab found a way to pack them into the Trail Breaker without compromising its minimalist design. Take the watch window in the sleeve, for example. This lets you keep the protection of your long sleeves but still access the data on your watch – great when you’re trying to move fast but also stay warm. And thumbhole cuffs ensure that those sleeves don’t ride up. One less thing to think about, one more reason to stay out there.