The Nago is an excellent beginner to intermediate climbers shoe that feels like our higher end performance shoes. The perforated lined synthetic leather in the arch area wraps the foot for a perfect fit. The 5mm Vibram® XS Grip outsole sticks to everything and the toes-flat low tension fit makes it a great shoe for all day comfort.Vibram® XS Grip The hardest and stickiest climbing rubber on the market made for La Sportiva by Vibram®. XS Grip comes in a number of different thickness" including 3.5 mm, 4 mm, and 5 mm. This proprietary formula surpasses all others in edging ability and smearing performance while remaining durable and even wearing.