Nike Men ACG Mountain Fly Gore-Tex 'Dark Grey' ShoesBlack Black Dark Grey This product was designed and tested in Oregon, USA GORE TEX product technology is a waterproof, breathable, and microporous material that helps keep you dry. It's been integrated with the upper, helping you stay comfortable in wet conditions. Nike React foam delivers comfort. Hard rubber wraps onto the toe and around the heel for durability. Sticky rubber outsole helps keep you upright and adds traction on a variety of surfaces.