This Deep Breathing Lung Exerciser is designed to help improve lung function and capacity. With its 3-chamber Incentive Style, it provides a progressive resistance training for your lungs. The exerciser is perfect for those who suffer from respiratory conditions such as asthma, COPD, or bronchitis. It is also great for athletes who want to improve their endurance and breathing techniques. The exerciser is easy to use and can be adjusted to your desired resistance level. Its compact size makes it perfect for home use and travel. Get ready to breathe easier with this Deep Breathing Lung Exerciser.