Dunlop Foams Next Generation Viscoflex Memory Foam Mattress Topper Overlay All the quintessential benefits of Visco foam, fine-tuned to new levels. Refined in its design, New Generation Visco features improved air flow and greater breathability. What makes the NGV foam different? It sustains the original Viscoflex properties, and reacts accordingly to changing ambient temperatures Improved open cell structure increases breathability More durable and effective in retaining shape Reactive to ambient temperatures, providing consistent comfort & pressure redistribution Anti-Microbial treated, fresher for longer Flexible support keeps you comfortable for hours Flexible support keeps you comfortable for hours With regular mattresses, no matter how firm, many people end up tossing and turning all night. This constantly interrupted sleep pattern can leave you exhausted, even after a full night's sleep. Memory foam toppers offer the flexible, gentle, and continuous support that ordinary mattresses lack. Memory foam's elastic properties allow the material to contour precisely to the shape of your body, cradling you in your natural sleeping position for comfort that lasts through the night.