NIKE Women's Lunarstelos Running Shoe Textile Imported Rubber sole Dual-density midsole features a super-soft core that sits underfoot for an ultra-smooth transition Articulated hot-knife cuts offer optimal flexibility, and the rubber waffle outsole delivers excellent traction on multiple surfaces Perforations on each side of the midfoot enhance airflow Rubber crash rail on lateral outsole for flexible cushioning Rubber waffle outsole delivers multi-surface traction