Women The perfect entry level trail runner returns in a new package from the ground up

and breathable fit with added visual interest

On the bottom

MEN We freshened it up from top to bottom to amplify the comfort and light stability that's been the foundation of Ultrafly from the start

Our ZipFoam™ compound is lighter

MTN Racer 4 Ultrafly 5 // Men Women The perfect entry levelWOMENS A fan favorite for race day and daily training, the Topo Athletic MTN Racer 4 offers rugged performance on technical trails. A 33 x 28 mm platform delivers underfoot cushioning and a protective barrier between you and the ground. Our new upper is fine tuned for performance on technical terrain. The MTN Racer 4 now features our FKT insole, allowing for faster water drainage and added rebound, while our improved gaiter attachment system keeps out