The Impact Mat is made to fit your specific make and model, filling in the ribs and contours of the truck bed to provide a smooth, void free loading surface. The integrated tailgate hinge overs the gap between your truck bed and the tailgate, this will eliminate the annoying build-up of debris between the two pieces. This mat will protect your truck while standing up to whatever you can throw at it: from mulch to bleach. The Impact Mat's TPO material is fade and UV resistant. The 3/4" thick foam is similar to that used in life jackets and will not absorb water, resisting mold and mildew. Water will simply run off the surface, through the zippered perimeter, out the factory drain holes in the truck bed and will dry in as little as 20 minutes.