Simplicity, efficiency and adaptability sum up the Terra Powerstrap X4 cycling shoes. They've been engineered for the drop bar rider who loves to ride mixed terrain, darting off the tarmac onto singletrack before ripping along an endless gravel road and seeking adventures beyond the normal. Combining the effortless efficiency of a road shoe with the durability of an MTB shoe they are truly versatile. Powerstrap Closure System The Terra Powerstrap X4 shoes make use of Fizik's ingenious new Powerstrap closure system to deliver simple to use and exemplary comfort. In order to offer stability and comfort throughout your ride, the Powerstrap system features a lightweight and reliable hook and loop strap system that, unlike a traditional strap, pulls together the two sides of the upper thanks to the ribbon wrapping around the foot. This provides even pressure across the whole foot from just two straps and delivers an unrivalled level of riding comfort with minimal bulk or complexity. X4 Outsole For a shoe likely to see action both on and off the road the sole unit needs to be versatile. Fizik developed a specific outsole, combining the stiffness of a road-going shoe with a pared-down rubber MTB style tread to provide grip and durability when you're off the bike. For riding on mixed surfaces, the nylon sole offers efficient power transfer but with dialled in flex to take the sting out of rougher terrain. Ride without limits and seek new adventures and new horizons with the Terra Powerstrap X4 cycling shoes.