3" thick polyurethane foam core attached to 1/2" thick, sealed, water resistant Extira wood. The front of each panel is covered in 19oz UV treated vinyl. Pad meets the minimum ASTM F2440 impact standard specification. May also be installed using "Z" clips allowing seasonal removal, repair, or replacement. Pads built to your specified dimensions with a maximum width of 4'. Custom graphics available with an additional charge.