When the moment comes for an attack in the hills, a long solo move, or a full gas sprint for the line, every watt counts, which is why we designed the S-Works Ares to be the most efficient and powerful performance shoe ever made. We combined decades of Body Geometry development with obsessive innovation working with the world‚Äôs best athletes to completely reimagine the race shoe. An entirely new, patent-pending closure system, Dyneema¬Æ-reinforced toungless sock, and ultra-stiff FACT Powerline‚Ñ¢ carbon outsole eliminate foot roll, reduce pressure on tendons, and transfer every ounce of power to the pedals for unprecedented performance and comfort. It‚Äôs 1% faster than any shoe we‚Äôve ever made, and at the finish line, that‚Äôs all that matters.Approximate weight: 220g (1/2 pair, Size 42)Dyneema¬Æ is sandwiched between layers of synthetic and TPU to create no-stretch zones for the ultimate connection and comfort.Form Fit last with a roomy toe box for the ultimate in connectivity and comfort.Independent BOA¬Æ Li2 Fit System for on-the-fly micro-adjustment, backed by the Boa¬Æ Guarantee.Non-slip, replaceable heel tread with internally recessed screws for security.Our stiffest and lightest FACT Powerline‚Ñ¢ carbon plate maximizes power transfer: Stiffness Index 15.PadLock‚Ñ¢ heel construction cradles the heel and is proven to improve acceleration.Patent-pending closure design secures the foot for extreme, out-of-saddle efforts, locking the metatarsals and preventing lateral roll.The key to more comfort, less injuries, and higher power output comes from our ergonomically designed, scientifically tested Body Geometry features‚ÄîLongitudinal Arch, Varus Wedge, and personalized insoles with a Metatarsal Button. When used in harmony, these three features align the hip, foot, and knee, while also limiting medial/lateral knee movement and maintaining good circulation down to your toes.Titanium alloy cleat nuts can rotate to position cleats 5mm rearward and fits all major 3-hole road pedals.