The NOVABLAST™ 4 Running Shoes feature a new midsole and outsole geometry that helps produce its most energized ride yet. A tongue wing construction in the upper helps improve the fit while reducing tongue movement. It’s complemented with an engineered woven upper that offers more stretch, ventilation and durability. Its FF BLAST™ PLUS ECO Cushioning made with 20% recycled bio content. This material helps create softer landings and a more energized toe-off during your training.