About EPS: Expanded Polystyrene is a type of foam also known as styrofoam or bead foam. Polystyrene beads are expanded to their desired density by using steam and a variable quantity of beads in a mold. Hand shaped EPS/Epoxy boards are different from molded Epoxy boards which is what we traditionally mean when we say Epoxy. Since the core is very light, the finished product is about 20% lighter than a polyurethane construction and more rigid. Our Mega Magics have so much volume we only use EPS for the Mega's to keep the weight down.