The traditional surfboard construction. PU (Polyurethane) foam & fibreglass + PE (Polyester) resin that has been used for the past 75 years in surfboard building.
PU/PE boards are constructed using the most premium materials. However this does not prevent the board from breakage or compressions. If any damage does occur, make sure to dry out all water from the PU core before repairing using Polyester resin.
It is recommended that you do not leave your board in direct sunlight or in a hot confined space.