* improved memory foam and latex * grafted a well-being function onto a bio property *ergonomic support for c-curved neck [ function ] * excellent elasticity * induces sound sleep * maintains a head and a neck in a c-shape * antibiotic and releases anions and far-infrared radiation * prevents an atopic disease * removes odor of sweat from a head * alleviates frozen shoulder. * alleviates snoring * no washing needed-no germs or odor [ specification ] (a) small pillow: * (net size) 460 x 240 x 90(mm) (gross size): 470 x 270 x 100 *net weight : 550(g) Gross weigh:1557(g) (b)large pillow: *(net size): 500 x 290 x 95 (gross size): 520 x 320 x 100 *net weight : 961(g) Gross weigh:2984(g)