LUNG EXPANDER

Planning an underwater escape?  Increase your ability to hold your breath longer the way professional athletes do!  This inspiratory/expiratory breathing resistance exerciser is a breakthrough product for increasing lung capacity and endurance.  Research shows that this type of exercise significantly improves the endurance of respiratory muscles, and increases the volume of lung ventilation.  It is a fact that breathing resistance exercise will develop stronger lungs, and this in turn can provide an endurance advantage for any sport.  One moving part, 100% rust proof & practically indestructible, this product is very easy and comfortable to use.  It's also pocket size (4"tall), so that you can take it anywhere.