Cushion Grip is the luxury rug cushion which holds it shape - won't spread or unravel. Cushion-grip has an exclusive super-strength interlining which adds years to the life of the cushion grip as well as your rug. Cushion Grip is moth-proof and not affected by moisture. Cushion-Grip is guaranteed to retain its originial propertities for 20 years or it will be replaced without charge.