The Stix manages to couple power and sensitivity to tackle the most challenging climbs with steep, overhanging routes.A Vibram XS Grip2 compound provides a sole which delivers grip with enough firmness for moderate edging.Scarpa's X-Tension rand system directs power to specific areas of the shoe for ultra-precise footwork.A narrow heel pocket combined with thermo-molded rubber ribs over the stretch tongue provides a very precise fit.