The fastest way to the top, the Women's All Out Blaze Aero Sport Shoe attacks terrain while allowing fluid, natural motion that responds to every contour for rapid agility. Its ventilated mesh upper is made for hot temperatures and forging creeks, moulding to your feet while keeping them cool and dry. The lining is treated with M-Select Fresh to contrl odour.Fuel efficiency comes from the energy-converting UniFly midsole that connects and protects over rough ground, while a moulded TPU heel counter adds stability.Merrell's Omni-Fit lacing system provides a precise, glove-like fit.