The NOVABLAST 4 LE running shoe features a midsole and outsole geometry that helps produce an energized ride. A tongue wing construction in the upper helps improve the fit while reducing tongue movement. It's complemented with an engineered jacquard upper that offers more stretch, ventilation, and durability. FF BLAST PLUS ECO cushioning is made with approximately 24% bio-based content. This material helps create softer landings and a more energized toe-off during your training.