Google AI to the rescue
Q: Is a PolyFusion shell the same thing as carbon fiber?
A: No, PolyFusion and carbon fiber are distinct materials.
Carbon Fiber
Composition: Woven strands of carbon atoms bonded with resin.
Properties: Extremely lightweight, rigid, and high in tensile strength. Used in aerospace, high-end automotive, and premium sports equipment. [1, 2, 3, 4, 5]
PolyFusion
Composition: A proprietary blend of thermoplastic polymers (often involving polycarbonate or ABS plastics).
Properties: Impact-resistant, flexible, and durable. Commonly used in hardside luggage and protective equipment.
So, it would seem that it may be made to look like carbon strands, but the reality is its not. That explains what looks like a seam on the back of the skate.