Foam is naturally tacky, which provides a low-slip surface to hold items in place. Foam also has greater tear resistance;it has more stretch and elasticity before tearing compared to standard PE foams, company says. The closed-cell construction provides moisture barrier and thermal insulation.
Sealed Air Corporation: Polyethylene foam
Sealed Air’s Cell-Aire® ST polyethylene foam provides a soft, nonabrasive, high coefficient-of-friction surface for superior product protection. The surface of the foam is ideal for protecting items such as furniture, dishware, electronics, and other fragile pieces from becoming scratched during handling and transportation.