GLT Products Vinaflex with Absorber/Decoupler (VP) Noise Barrier is a flexible, mass loaded vinyl laminated to a quilted fiberglass decoupler on one or both sides. The combination forms a thin, lightweight acoustical product that displays excellent mechanical properties while providing superior sound transmission loss. Sound waves originating from the source will be initially absorbed by the fiberglass and then blocked by the mass loaded vinyl. Any reflected sound wave component will be further dissipated into the fiberglass absorber.