These socks are a practical comfort upgrade for high-performance foot pockets where fit and sensitivity matter

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C4 Carbon - Protech Freediving Fins lanyards These socks are a practicalC4 PROtech Freediving Fins The C4 PROtech Freediving Fins are high performance carbon freediving fins built for divers who want efficient propulsion, precise blade response and a secure anatomical foot pocket connection. C4 designed the PROtech around a complete blade foot pocket system: a multilayer carbon blade, a right left anatomical foot pocket, a monoblock blade foot pocket structure and a hydrodynamic geometry developed for smooth, technical