The New Balance MT620 is a running shoe with aggressive styling built for the next generation of trail runners. It features full length N-FUSE technology which joins foams of two different densities. The top foam is less dense for added cushioning while the lower foam is more dense to provide support and compression set resistance. The IMEVA (injection molded EVA foam) midsole helps give more firm, yet flexible cushioning. The synthetic/mesh upper gives lightweight comfort and support while the solid rubber outsole provides long-wearing durability. It features an AT Tread all-terrain outsole which combines a running and trail lug configuration for off-road or on-road use and also has a molded external heel counter.