【Re:flip Topper with Soft and Firm Options】- Re:flip Queen Memory Foam Mattress Topper provides a perfect balance of softness and support for deep sleep. One side features 1-inch firm foam with varied wave-shaped cuts, providing ample body support effect. The other side features 2-inch soft memory foam, better conforming to body curves to relieve pain and pressure 【Ergonomic 5-Zone Design】- This mattress topper queen features a ergonomic 5-zone design, achieving genuine pressure relief and body support. As the body parts are interconnected, we have categorized the product into five areas: Neck & Shoulder Stress Relieving, Lumbar Vertebrae Support, Hip & Thigh Contour, Knees & Calf Pressure Distribution, and Feet Stretching. Adapts to body pressure, providing excellent support and relaxation 【Premium Slow Rebound Memory Foam】- Our queen mattress topper features premium CertiPUR-US certified slow rebound memory foam. Its high-density ensures sufficient support and optimal soft comfort, allowing you to sleep soundly throughout the night 【2-Sided Breathable Washable Cover】- Our innovative dual-sided cover offers more choices for matching. Made of skin-friendly, breathable fabric certified by OKEO-TEX. The deep gray side is dirt-resistant while the white side is versatile. With a 3-sided zipper for easy removal and washing, and 4 adjustable corner straps to secure the topper. You can freely choose which side of the core to pair with your preferred cover for a refreshing night's sleep 【Warm Tips】- Please be careful to cut and remove outer plastics without scratching the topper during unpack process. It's highly recommended to leave the foam for 24-48 hours until it regains its queen size and shape again. There may be a slight foam odor when you open the package, no need to worry