Women's New Balance Fuel Cell Propel V4 Running Shoes - Black - Low-top sneakers New and experienced runners alike will appreciate the underfoot ride and innovative technology packed into the new balance fuel cell propel v4. Featuring a thick fuel cell midsole combined with a tpu plate, this running shoe is designed to maximize comfort and traction to help keep you moving at top speeds. Features fuel cell foam delivers a propulsive feel to help drive you forward upper features no-sew construction for a sleek fit and feel engineered upper synthetic/mesh construction tpu plate for superior propulsion adjustable lace closure for a customized fit 6mm drop; due to variances created during the development and manufacturing processes, all references to 6mm drop are approximate.