New Balance Men's MT573GB is a rugged and durable trail running shoe which features N-FUSE® technology to provide you with superior cushioning for all outdoor activities, and the Ndurance® outsole gives you traction everywhere from your favorite running trail to the treadmill at the gym. Suitable for those with a neutral running gait. Synthetic/Mesh upper provides lightweight comfort and support. N-FUSE® Heel joins together foam of two different densities. The top foam is less dense for soft cushioning, while the denser bottom foam provides support and compression set resistance. Aggressive Lugged Outsole gives maximum traction for off-road activities. Ghillie lacing system provides a custom, supportive fit. EVA (Ethyl Vinyl Acetate) foam footbed for cushioning. N-Durance® rubber compound for maximum outsole durability