The Piranha SP® 5 is the lightest racing flat ever built by ASICS - weighing in at a mere 3.9 ounces! This shoe has a Solyte® Midsole and DuoSole® Outsole on a 4.5mm drop, combined with a highly advanced upper featuring Seamless Construction for improved fit. Providing optimum feedback from the road, this shoe is purely for the serious running and racing competitor. Weight: 3.9 oz. Heel Height: 9mm. Forefoot Height: 4.5mm.