When you're scrambling up a rocky bluff or bouldering along a riverbank, the last thing you want is gravel and grit seeping into your five fingers. The KSO is an all-new design with thin, abrasion-resistant stretch polyamide and breathable stretch mesh that wraps your entire forefoot to "keep stuff out." A single hook-and-loop closure helps secure the fit. Non-marking Vibram TC1 performance rubber soles are razor-siped for a sure grip. The KSO is best for light trekking, climbing, bouldering, canyoneering, running, fitness training, martial arts, yoga, pilates, sailing, boating, kayaking, canoeing, surfing, flats fishing, and travel.