New Balance Men's Mt310 100% Synthetic Rubber sole Shaft measures approximately 3" from arch Specifically designed to defeat the most challenging trails the New Balance 310 running shoes are rugged and resistant, but still very light.^Synthetic leather and mesh upper offers enhanced ventilation and durable style.^Built-in Rock Stop protection shields against rocks.^Moisture-wicking mesh lining keeps your feet cool and dry.^Sure Lace secure shoe laces provide added midfoot support and keep the shoe snug around the foot.