Designed specifically for the Adult and Jr Swimmer’s Snorkel, the Snorkel Cardio Cap can be used for hypoxic training, which increases the ability of muscles to work better when oxygen levels are low. The Snorkel Cardio Cap replicates higher altitude workouts. The Snorkel Cardio Cap improves breathing by teaching a deeper technique for high anxiety and race day environment. Using the Snorkel Cardio Cap is also a great way to strengthen intercostal muscles through forced inhalation and exhalation. Fits on top of any FINIS snorkel (except the Learn-to-Swim Snorkel) to restrict air flow for increased cardiovascular conditioning. FEATURES & BENEFITS: •DESIGNED SPECIFICALLY FOR THE ADULT & JR. SWIMMER'S SNORKEL •HYPOXIC (LOW OXYGEN) TRAINING Increases the ability of muscles to work better when oxygen levels are low •REPLICATES HIGHER ALTITUDE WORKOUTS Increases the amount of red blood cells and hemoglobin •IMPROVES BREATHING Teaches a deeper breathing technique for high anxiety and race day environments •LUNG CONDITIONING Increases lung workout load by 40% •STRENGTHENS INTERCOSTAL MUSCLES Aid in forced inhalation and exhalation