Take a quantum leap and keep leaping! The MorphoDynamic? system lets you run over the gnarliest terrain while keeping your foot stable and protected. The slip lasted (that means the shoe fits your foot better) mesh upper is comfortable and extremely breathable.No dead spots, no blisters, no tired feet and no excuses. The La Sportiva Quantum lets you keep your mind on the run and the fun. A lighter version of the Electron. Geared towards people looking for a lighter, more form-ftting upper in a highly cushioned neutral shoe.
Rock/Creek suggests you try going up 1/2 Euro size for a great fit.