* Provides a protective barrier between the waterbed mattress and frame to prevent accidental water spillage * Made with self-supporting, structured sides for easy installation and a custom fit * Made from quality vinyl for strength and durability * Ideal for traditional wooden sided waterbed frames * Durable 6 mil. vinyl * Easy, no tools assembly * Prevents water from leaking to the floor when properly installed * Protects the mattress from splinters and the abrasive wooden frame or decking * Inhibits plasticizer migration from the mattress near the heater so that the mattress vinyl can maintain its suppleness * A safety liner is required to maintain the validity of a waterbed mattress warranty