Newton Running Womens Gravity V Mesh Imported Engineered mesh - Is seamless and provides lightweight breathability and structure in key areas. 4-way Stretch mesh Metatarsal Panel - Offers a more individualized fit. Overlays - Are anatomically placed to provide a secure fit. Stabilization tongue - Features a radial band to provide a comfortable precision fit. Heel Lace Lock - Provides a snug heel lockdown.