Whether it is your first run, or you're scaling up your training, the New Balance FuelCell Propel v4 is engineered to maximize your comfort. Features Mesh upper with no-sew construction is engineered for a sleek fit and feeling FuelCell foam creates a propulsive sensation underfoot to drive you forward TPU plate helps the midsole snap back for a quicker, more responsive feeling Rubber applied sparingly to key zones for lighter, more flexible traction 6mm drop from heel to toe