Flow has a dual chamber that is soft on one side and firmer on the other and features a patented 100% breathable cover. The Air-X® fabric is a 3-D structure that creates a cushion of air with spring-like yarns that allows air to move more rapidly. It has a soft, jersey-like feel, gray-colored cover with eye-catching metallic-silver-colored piping with slate blue mesh sides. The lowest height pillow includes one air vent and a mesh patch on top and bottom while the other three heights include 10 air vents and mesh on all sides. The air vents and mesh give the Flow pillow cross-ventilation for maximum breathability. Flow’s zip-off removable and washable cover creates a clean and healthy sleep environment.