Matteo Bisol, Urethane roto casting resin with high density urethane foam core. These materials represent a quantum leap in terms of detail and durability. Matteo  is the first cast that I did with Carole and, as luck would have it, it is one of the most beautifully detailed casts that I've ever worked on. Almost every nuance, pore and imperfection are perfectly present. It's surfaces are absolutely hyper realistic.