Designed with a hollow center cavity, this cervical neck pillow cradles the back of your head while maintaining space for natural neck curvature. The odorless memory foam orthopedic pillow features an ergonomic shape with specific    curves, divots, and angled planes intended to match the cervical spine position for side sleepers, back sleepers, and stomach sleepers. The contour pillow includes two different thickness profiles—simply rotate the pillow    180 degrees to choose between a higher loft or a lower loft. Additionally, a removable insert at the bottom allows for further height adjustment to suit individual preference. The outer cover is made from Ice Silk fabric, which feels smooth against    skin and allows airflow. The cover unzips completely and is machine washable for routine care. This adjustable height pillow comes compressed for shipping; the manufacturer recommends airing the pillow for 48 hours before first use to allow    full expansion and natural odor dissipation. Individual comfort may vary based on body shape, sleep position, and neck curvature.Product Specifications:        Fill Material: Odorless memory foam (slow rebound)        Design: Ergonomic contour with hollow center cavity        Loft Adjustment Method 1: Rotate pillow 180° (two built-in thickness options)        Loft Adjustment Method 2: Removable bottom insert (adds height)        Cover Material: Ice Silk fabric (breathable)        Cover Care: Removable and machine washable        Sleep Positions: Side, back, stomach        Pre-use Instruction: Air for 48 hours to allow full expansion and natural odor to dissipate