Connect offers a removable insole and a finished footbed

Our ZipFoam™ compound is lighter

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

The Vibram® Megagrip outsole provides reliable traction and durability

MTN Racer 4 Ultrafly 5 // Men Connect offers a removable insoleWOMENS 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