Approximate weight: 224g (1/2 pair, Size 42). Body Geometry sole and footbed are ergonomically designed and scientifically tested to boost power, increase efficiency, and reduce the chance of injury by optimizing hip, knee, and foot alignment. Dyneema Mesh is trapped between layers of four-way stretch mesh 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. Non-slip, replaceable heel tread with internally recessed screws for security. Our stiffest and lightest FACT Powerline carbon plate maximizes power transfer: Stiffness Index 15.0 PadLock heel construction cradles the heel and is proven to improve acceleration The Boa Fit System S3 dial allows for on-the-fly micro adjustment, backed by the Boa Guarantee. The Boa Fit System dials and laces are guaranteed for the lifetime of the product on which they are integrated. Three-bolt cleat pattern fits all major road pedals. Titanium alloy cleat nuts can rotate to position pedal/cleats 5mm rearward.