Functions   This unit contains 70%~80% air and 20%~30% water, providing warmth in winter and coolness in summer Hardness and height adjustable, meets ergonomics Dust and bacteria resistant Compact in size for easy carrying after being drained and exhausted Can be used as an ice pillow after being frozen, an ideal unit for reducing fever. Increases the air-passing volume in trachea, reducing snoring and upgrading sleep quality. Double-Flotation Air &Water Pillow   ......................................................................................................................................................................................................................................... Air Control System Health Pillow   Features   Unique Micro-adjustable Air Bag for Better Neck Comfort With a hand pump, the pillow height can be easily adjusted by pumping the air in or release the air out according to individual requirements, improving neck comfort and sleeping quality. Anti-moth, Mold and Bacteria Made of high-tech inorganic material under high-temperature bacteria-free environment, our pillows are excellent in fighting moths, mold and bacteria. Excellent Ventilation Made of high-density, low-resiliency, high-ventilation and low pressure-resistance foam material, our health pillows are highly ventilative and they retain the shape of user's neck and head for sleeping comfort. Proven Quality Our pillow quality is perfectly approved by our customers, including high-end hotels, medical institutes and rehabilitation centers.