Women's New Balance Fresh Foam 680 V8 Running Shoe - Black - Low-top sneakers Fresh Foam midsole foam cushioning with approximately 3% bio-based content is precision engineered to deliver an ultra-cushioned, lightweight ride. Bio-based content is made from renewable resources to help reduce our carbon footprint. Precision-engineered knit upper for maximum comfort and targeted ventilation Integrated rubber outsole for enhanced underfoot comfort in every step 8 mm drop; due to variances created during the development and manufacturing processes, all references to 8 mm drop are approximate Upper features no-sew construction for a sleek fit and feel.