The grating is a thin film composed of many strip lenses. When we look at it from different angles of the lens, we will see the image on a very thin line on the other side of the thin film, and the position of this line is determined by the viewing angle. Decide. If we print several images on different lines corresponding to the width of each lens, and print them on the back of the grating sheet in order, when we look through the lens from different angles, we will see different images (figure Show 1), in this way, an interesting three-dimensional or dynamic effect is formed visually. It is important to have a Memory Foam Pillow which can contour to accommodate the natural curves of the neck to maintain the proper neck posture while sleeping. Whether you sleep on your side or back, your pillow must be soft enough to mold to your head and still fill in the space between your bed and your neck. You need to support both, since your head is larger than your neck and our Gel Memory Foam Pillow is great for this. This pillow will support the head at the proper height whether you are sleeping on your back or on your side, keep your head tilted in the proper position while sleeping on your back and provide neck and upper back support when sleeping on your back. Cooling Gel Memory Foam Pillow Cooling Gel Pillow,Comfort Revolution Pillow,Gel Memory Foam Pillow,Cooling Memory Foam Pillow Shenzhen Comfity Technology Co.,Ltd , https://www.comfitymemoryfoam.com