NIKE Lady Air Alvord 10 WS Trail Running Shoes *** UPDATED** Water Shield Upper - For water protection when running in the rain. Rearfoot Encapsualted Air - for extra cushioning when on that uneven ground. Nike Air Cushioning helps to give a much more cushioned ride. BRS 1000  Carbon rubber outsole for great durability in key wearing areas making your trainers last longer. Rugged Rubber Outsole - Help keep your footing on even the muddiest course.