PE (polyethylene) plank foam is an outstanding cushioning choice as it offers superior support for your heavier items. This closed cell foam is tear/moisture resistant and has insulating properties. Plank foam can be bonded to itself, corrugated boxes or wood panels making this foam an incredibly flexible packaging and cushioning material. Plank foam is sold by the square foot or full plank, and can be custom cut by us to fit your packaging needs. The 1.7# density foam is an excellent choice for your light to medium weight packaging needs, and the 2.2# density is more rigid and heavier duty than the 1.7# density.