The New Balance MT840 is a highly druable and versitile running shoe designed for extreme terrain runners looking for oustanding performance. The seamless phantom liner and synthetic/mesh upper reduce the shoes weight, enhance comfort, fit and support while the N-LOCK external support system ensures the shoe is pulled snuggly around your foot. The C-CAP midsole provides furhter cushioning and support and the Abzorb cushioning in the heel and forefoot provide exceptional shock absorbtion. The durable N-Grip solid sticky rubber outsole gives traction to slick surfaces and the N-Durance rubber compound gives the shoe maximum outsole durability. The gusseted tongue is fully attached to the shoe to keep debris from getting in.