PPL-24® is a 24 mil (24 thousandths of an inch) thick Reinforced Polyethylene (RPE). It is a "5 layer" construction consisting of 3 layers of LDPE (Low Density Polyethylene) coatings sandwiching 2 layers of HDPE (High Density Polyethylene) reinforcing scrim. This method of construction results in an incredibly puncture and tear resistant lightweight liner material. To our knowledge, the PPL-24 is the strongest RPE available today, and Bend Tarp & Liner, Inc. is the nation's sole source for this product. PPL-24 was originated, developed, and popularized in a team effort by Bend Tarp and Liner, Inc. and Matai, Inc. USA, beginning in the 1980's.
I am on my honey's lappy, mine gave the blue screen of death doing diagnostic tests on it right now.