Some training runs are meant to push you past your comfort zone

which reduces the risk of suffering a knee injury

Lightweight solid rubber outsole

Articulated knees

This core makes no performance concessions in its quest to be ultra-light

New Balance Women's FuelCell Shift TR *SALE* Trekking Poles Some training runs are meantMade to help boost your agility training, our FuelCell Shift TR features a springy FuelCell midsole for an ultra responsive and comfortable ride through high intensity drills. These innovative women's training shoes also feature a state of the art FitWeave Lite upper with no sew overlays for a lightweight feel that delivers a supportive, locked in fit. FuelCell foam delivers a propulsive feel to help drive you forward FitWeave Lite Upper features no