... seen as a packaging material . Polyethylene foam is also a durable, lightweight, resilient, closed-cell material available in ... and ozone friendly, recyclable, odorless, and very lightweight. Many types of polyethylene are approved for use in ... / roofs, foundation wraps, sound barrier underlays, false ceilings, structural glazing.SportsWrestling, judo, gymnastics, taekwondo, and jogging exercise mats ...