Unleash your natural stride in the zero-drop, natural-inspired design of the Vivobarefoot® Primus Road running shoe.Predecessor: None.Support Type: Neutral.Cushioning: Barefoot feel.Surface: Road.Differential: 0 mm.Lightweight, breathable airmesh and laminated PU upper materials. Lace-up closure. Thin tongue and lightly padded collar. Soft textile lining offers a great in-shoe feel.100% vegan-friendly construction. Removable, thin foam insole. Ultrathin, flexible man-made outsole protects feet without compromising a barefoot feel.Outsole Thickness: 3 mm.Imported. Measurements: Weight: 5 ozProduct measurements were taken using size 39 (US Women's 8.5), width B - Medium. Please note that measurements may vary by size.