Synchwire construction is a stitchless upper thats vented and reinforced to create a lightweight cycling shoe with incredible airflow and structural integrity Synchwire is an advanced composite of thermobonded film that provides overall durability a nonwoven internal sheet for distributing the force from the closure system to the upper for direct power transfer and monofilament mesh for ventilation Our dualinjected outsole combines an injectionmolded nylon and glass fiber plate for powerful efficient pedaling thats fused with an aggressive rubber outsole for impressive durability grip and traction in rocks and mud