Hybrid construction means soft compressible foam where you want it and tough high density foam where you need it. The inner core of the new foam bumper is a lower density EVA foam (2.8 pounds per cubic foot) and the outer (front and back) pieces are tougher, higher density PE foam (8.7 pcf). UV protected foam material is maintenance free, non-marring and provides superior cushioning from impact. Designed for both horizontal and vertical applications, dock cushions are pre-drilled and ready to mount. Hardware not included.