This 4-inch thick memory foam mattress topper will bring new life to any mattress. Open cell construction yields a longer lasting, more resilient foam that will not leave long-lasting body impressions. Lucid memory foam quickly conforms to weight and pressure. This mattress topper will help relieve neck, back and shoulder pain by reducing pressure points. This, in turn, helps to correctly align the spine by supporting the natural curves of your head, neck and shoulders. Memory foam topper features a ventilated design. Evenly-spaced ventilation channels help to increase airflow and regulate sleeping temperature. The sizes for this topper follow standard bed sizes minus 1 inch on each side of the length and width to ensure your sheets fit over the topper and your mattress. 4 Inch Thick 100 Premium Memory Foam Mattress Topper Lucid Memory Foam Formula Offers Superior Comfort And Pressure Relief Open Cell Technology Prevents Lasting Body Impressions Ventilated Design Improves Airflow And Helps Regulate Temperature Naturally Resistant To Allergens And Dust Mites 3 Year Warranty Features: Memory Foam Bed Size: Twin Xl Measurements: 78 Length/Inches, 36.5 Width/Inches Base Material: 100% Polyurethane Care: Spot Clean Mattress Pads & Toppers Type: Mattress Toppers Country of Origin: Imported