Developed with and tested by The North Face® athletes, Flight Series™ is our premium running collection. And the Trinity is our signature Flight Series shoe. Designed for off-road, cross-country and mountain trail running, these shoes feature a highly responsive FastFoam™ midsole that gives back as much energy as you put in. It has a lightweight, breathable OrthoLite™ footbed that delivers a cooler, drier and healthier environment inside the shoes. The gusseted tongue isn't just comfortable; it helps keep dirt and grit at bay. An internal, seamless bootie has been engineered to adapt to the unique features of your foot achieving outstanding customised support. On the outside, the heel overlay helps provide stability, while the ripstop upper is durable and breathable. And finally, to the sole: thanks to our Exploration Trax System™ traction is ensured on both wet and slippery and dry and gravelly trails.