UPPER Combines multi pieces of microfiber with seams that do not create overlap. Elastic gusset makes for an easy fit. LACING The new Nano Strap system allows you to customize the fit of the climbing shoe through 3 different closure modes. "Slipper mode" is the most relaxed mood, "Fast mode" for more instep adhesion, finally "Strong mode" for closes tight around the ankle.INSOLE Full-length Talyn 1.0mm insert from heel to toe helps spread the force across the whole foot.ACTIVE RANDING Bi-Tension active randing system runs under the toes and draws back through the arch of the foot to give great flex with subtle tension. SOLE 3.5mm Vibram® XS Grip 2 sole.