Memory foam plus cooling gel; Tailbone cutout provides relief by alleviating pressure on spine & promotes vertebrae alignment; Relieves pressure with soft, high-density memory foam; Durable mesh cover wicks moisture & heat from body; Cool-relief gel cells refresh & prevent heat buildup; Breathable inner liner maintains maximum cooling transfer from gel system; Phthalate-free; Removable & washable cover also wicks moisture & heat from the body; Ideal for home, office or travel; Carrying handle for travel use;