Salomon brings countless heritage designs into the modern era, with upgrades to ensure they don’t get left in the dust on today’s trails.Based on the mid-2000s design that shaped years of trail running expertise, the ACS+ OG Sneaker features an original open sandwich mesh upper and a proprietary Agile Chassis System™—a unique heel shock absorber that prevents heel rolling on uneven terrain—for a progressive adaptation of a trail-running icon.