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 The BOAreg L6 Fit System provides fast microadjustability with the turn of the dial The combination of the dial lace and guides reduces weight and provides finer adjusment 1mm increments compared to traditional buckles and it offers an instant release function too The BOA Fit System dials and laces are guaranteed for the lifetime of the product Our injectionmolded nylon and glass fiber outsole is stiff and light and features overmolded heel and toe pads for durability The universal 32 cleat bolt pattern allows you to choose 2bolt or 3boltstyle cleatpedal systems for versatility and personal preference Reflective details enhance visibility at nighttime or in lowlight conditions when illuminated by a light source such as headlights by returning the light back to the source and reaching the drivers eye