Our product is upgraded designed which is more more convenient for grabbing and tapping. It can help with problems related to mucus, sputum, and expectoration. The percussion treatment works wonders in helping cough up phlegm and providing relief from chest congestion. It is made from environmentally friendly silicone that is safe, durable, and resistant to high and low temperatures. It is easy to clean and reusable, making it an ideal long-term solution for your chest physical aid therapy needs. Available in multiple colors, this chest physical aid therapy device is the perfect accessory for your loved ones.