Two crested-multi functional neck pillow eliminates neck, back and waist problems caused by the wrong pillow. thanks to its specially designed two different heads, it appeals to those who prefer both low and high pillows. viscoelastic sponge can provide resistance against dust mites due to its nature, so this pillow allergy can be avoided. heat and humidity management – heat regulating microcapsules in a special thermal sheath and ventilation channels processed into the pillow provide optimal ventilation and ideal temperature management. this means less sweating and chills during sleep. thus, you will get a comfortable sleep experience. the feature of flexible visco foams is open cell elasticity providing air permeability and being lightweight. its purpose is to fill the neck cavity and provide a comfortable sleep. ease of breathing prevents excessive sweating, heartburn and restless sleep during sleep. it helps to reduce morning headache and dry mouth caused by wrong pillow choices. it reduces the pressure. it reduces the severity of sleep apnea, which causes serious complications in the long term. it is suitable for all sleeping positions. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.