The KSO is one of the most successful FiveFinger models mainly due to its versatility. Whether you're scaling a rocky bluff or bounding along a riverbank, the last thing you want is gravel and grit infiltrating your FiveFingers. That's why we engineered the KSO with a focus on Keeping Stuff Out (KSO). With its snug fit, the KSO has one of our most minimal sole constructions, maximizing ground feel while providing protection. Its breathable and quick-drying upper, featuring a thin, abrasion-resistant stretch polyamide and breathable stretch mesh, envelops your entire foot for that protection. A single hook-and-loop closure ensures a secure fit, while the non-marking XS Trek performance rubber soles are razor-siped for enhanced grip.
