Aivermeil 3 inch Memory Foam Mattress Topper Protects Your Sweet Dream. Advanced Gel-Infused Memory Foam Our 3-inch high-density memory foam can increase softness and help disperse stress on your body, making you sleep more comfortably. RELIEVE PAIN & CONTOURING SUPPORT Our memory foam conforms flawlessly to the body's curves, keeps your spine in its natural alignment and prevent your shoulder ,waist,neck pain regardless of sleeping position. And 3 inch buffer space greatly relieves pressure, making it comfortable and improving sleep. Adjustable elastic straps Keep the memory Foam securely in place Anti-slip Surface Preventing any unwanted shifting Convenient Zipper Design Allows for easy disassembly and washing. The mattress cover can be machine washed in a gentle cycle with cold water and tumble dry on low for maintenance. Please allow 48-72 hours for your mattress topper to fully expand.