FuelCell foam delivers a propulsive feel to help drive you forward Upper features no-sew construction for a sleek fit and feel Synthetic/mesh construction 6mm drop; due to variances created during the development and manufacturing processes, all references to 6mm drop are approximate TPU plate for superior propulsion and traction Stylish, comfortable, and packed with innovative technology, the New Balance FuelCell PropelV4 is a favourite among new and experienced runners alike. This women’s running shoe features a thick FuelCell midsole combined with a TPU plate for ultimate comfort and a smooth underfoot ride.