The Topo Athletic MTN Racer 3 is a highly capable trail shoe that features a protective yet nimble underfoot experience that's perfect for anything from all-day adventures to ultramarathon trail races. With 3mm more stack height of Topo's new ZipFoam formula, the midsole delivers a softer and more energetic ride than its predecessor. The added foam offers increased comfort over long distances without sacrificing the shoes nimbleness or stability, allowing the runner to swiftly navigate the twists and turns of any trail. The Vibram Megagrip outsole provides exceptional traction and durability on any surface, ensuring that runners remain in control. Meanwhile, flex grooves throughout the durable outsole design contribute to the shoe's smooth and agile ride. The strong and breathable mesh upper features Topo's signature roomy toebox for a comfortable and accommodating fit regardless of the distance traveled. Overall, the Topo Athletic MTN Racer 3 is a high-performing trail running shoe that excels on a wide range of terrains, making it an excellent choice for trail runners who seek both versatility and performance. What You'll Love Additional cushioning Versatile for any trail run Balances protection and nimbleness Technologies MIDSOLE ZipFoam formula is softer, lighter, and more responsive than before. Ortholite Sockliner provides a soft and comfortable step-in feeling. OUTSOLE Vibram Megagrip offers fantastic traction on any surface. UPPER Mesh upper is breathable and durable.