Find speed and endurance in the New Balance Sigma Aria. New Balance built the Sigma Aria on top of an aggressive plate studded with eight removable spikes. While the plate gives the shoe a fierce stance, it’s made from a less rigid material for a more forgiving ride over longer distances. With an engineered knit upper reinforced with a durable external film, the New Balance Sigma Aria is the race-day weapon you need to compete at your highest level.