Heathy neck pillow, through the balanced support of head, neck, and shoulder, the three-point curve forms a curvature that fits the cervical spine, promotes sleep, and prolongs deep sleep time. From the manufacturer User Guide Take it out, slight shaking & patting, then leave it for 2 hours let it fully expand. Cool and breathable Microfibers are distinctive for their unique thinness and strength. They are even thinner than most natural fibers such as silk. Suitable for back, stomach, and side sleepers. And it is ultra-suitable for side and stomach sleepers. Choosing Meoflaw HOME SERIES, your satisfaction is our motivation to produce better products.