Trail running socks - Trail Ultra black Size Socks:37-38 Toe separation: toe box separating

Toe separation: toe box separating the big toe from the others

Toplayer: Cushioning

Microfibre overlay: Soft-touch feel

Heating elements: gentle and constant heat to keep your feet warm

Trail running socks - Trail Ultra black Size Socks:37-38 Toe separation: toe box separatingMuscle fatigue causes the foot to collapse and lengthen, and the metas to widen. We have taken these phenomena into account when designing this new range of socks with the athletes of Team Sidas Matryx. Thanks to the Ultra Fit technology, the Trail Ultra socks act like an exoskeleton to compensate for the consequences of muscular fatigue of the foot during an ultra trail. The Trail Ultra sock includes all the features of the perfect ultra trail sock: