Trail running socks - Trail Ultra black/yellow Size Socks:39-40 Can also be customised to

Can also be customised to your feet in 10 minutes with Flashfit™technology

The 3Feet® LOW from Sidas is an insole specially adapted to the anatomy of flat feet and thus ensures the best possible wearing comfort

good body alignment and comfort in your slim-fitting city shoes

The reflective strip on the back of the sock provides better visibility for your night runs

T-Free® Technology for Natural Movement

Trail running socks - Trail Ultra black/yellow Size Socks:39-40 Can also be customised toMuscle 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: