The fastest way to the top, this speed hiker from Merrell attacks terrain while allowing fluid, natural motion that responds to every contour for rapid agility. Its ventilated mesh upper is made for hot temps and fording creeks, moulding to your feet while keeping them cool and dry. The Women’s All Out Blaze Aero Sport‘s Efficiency comes from the Unifly midsole that connects and protects over rough ground. With Vibram outsole. Vegan-friendly footwear.