With a density of 6,000 g/m2, Hydro Fix Comfort Core™ has 100% more density than all other WPC floors in the marketplace. This advantage comes from the proprietary blend of PVC, resins and minerals, which yield the highest density and most stable core in the multilayer flooring industry. WPC, in contrast, uses a foaming agent to introduce tiny air pockets in its core board. This foaming technology reduces costs, density and durability of the core of these floors.