merrell women's all out blaze aero sport hiking water shoe,blue heaven,8 m us merrell the fastest way to the top, this speed hiking 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. fuel efficiency comes from the energy-converting unifly midsole that connects and protects over rough ground.