Synthetic and mesh upper Openings at the lateral and medial sides of the upper optimize airflow Cage housing provides structure Agile Chassis System helps stabilize your stride Metal lacing structure Speed laces Heel pulls for easy on and off Contagrip rubber outsole improves grip Salomon’s ACS Pro takes us back to the early 2000s. Coming from the brand’s Advanced line, the shoe may look familiar to some — that’s because it’s designed as a retro release of the decades-old GCS Pro. The new and improved silhouette draws heavily from Salomon’s archetypal technical footwear, all while boasting functional, modernized upgrades that have it primed and ready for daily wear. The trainer’s synthetic and mesh upper is outfitted with strategically placed openings on both sides to optimize airflow, as the brand’s signature Agile Chassis System is implemented to help stabilize your stride each step of the way. Other familiar Salomon details include speed laces and a Contagrip rubber outsole that enhances grip.