The shelf life of Medical Sterile Cotton Swabs in sealed condition is three years. Medical sterile cotton swabs are commonly used in clinical practice, characterized by non-toxicity, sterility and non-irritation, good water absorption and easy to use. It can be used directly for wound treatment. In general, sealed state medical sterile cotton swabs commonly used ethylene oxide and other disinfection, the shelf life is three years, within three years the cotton swabs can be used up. The bulk of the medical swabs or have opened the sealed package of medical swabs, the general shelf life of 3 days. Medical sterile cotton swabs are made of medical defatted cotton and natural birch wood, the cotton fibers of the swabs are soft, white and odorless, and the surface of the swabs is smooth and burr-free. It should be noted that the cotton swabs should be placed in a room with relative humidity not exceeding 80%, no corrosive gases and well ventilated, avoiding high temperature.