The Mavic Men's Zxellium Road Cycling Shoe is an excellent performer that offers great energy transfer thanks to the Energy Full Carbon outsole combined with the Ergo Lite Upper for breathable comfort. High modulus carbon fiber and titanium mean the shoe is super lite weight with maximum energy transfer. The Energy Frame + provide a lateral and medial TPU frame for an exceptional foothold and support. It has a full carbon 3D heel counter that provides an excellent heel hold just above the calcaneous bone; it is 50% lighter than injected heel counters. Mavic insoles are constructed of multiple density pre-shaped vibration dampening foams to optimize moisture management, fit, and comfort. Perforated and open cell foams work together to increase comfort by evacuating moisture and inhibiting odors. With the Ergo Strap SL is a light weight version of the Mavic advanced closure system, they are 25% stronger than traditional straps due to Kevlar cables. The Ergo lite Upper provides optimal comfort and lightweight, breathable construction.