Showcasing a dual-chamber construction, BEDGEAR's Cosmo Performance pillow features soft on one side and firm on the other. This 1.0 size has been sleep tested as ideal for small to medium body types and back or side sleepers. The unique dual-chamber design includes a React foam crown and React foam blend which contours to your body, eliminating pillow bounce to improve deep sleep. Crafted with 10 air vents and patented Air-X mesh on all sides, it creates cross-ventilation for maximum breathability. Cosmo incorporates BEDGEAR's patented Ver-Tex instant-cooling cover to reduce sweat and heat buildup. Cosmo's zip-off removable and washable gray cover, boasting a marquee-diamond pattern with rose gold stitching, promotes a clean and healthy sleep environment.