When you take part in an ultra-trail—long distances, hours of running, varied terrain, elevation changes, descents, climbs, technical ground, weather variations—the strain on your feet is much greater than during a simple jog: muscle fatigue, slight swelling of the foot, repeated friction, moisture, overheating or cooling, uneven footing, impact from rocks or roots.
Standard socks are often unsuitable: lack of support, insufficient moisture wicking, poorly protected friction areas, poor fit in the shoe. Ultra-Trail socks offer a high level of technical performance: support, comfort, moisture wicking, reduced friction and morphological adaptation — essential elements for ensuring comfort, performance and protection for your feet over tens or even hundreds of kilometres.