Apl athletic propulsion labs uses cutting-edge technologies to improve your performance in the gym and on the track. These trainers have newly developed 'rebound' techloom uppers that flex comfortably around your feet , strategically placed ventilation zones boost airflow , propeliumTM midsoles provide excellent cushioning and energy return , durable rubber outsoles feature forefoot crash pads to soften landings , seamless sockliners and strategically placed laces keep them secure , 8mm heel-to-toe drop, ideal for runners who land heel first. Colour: white