Snorkelling is an easy and fun activity for all the family! Breathing through a snorkel is more physically demanding than regular swimming. If you feel tired, short of breath or dizzy, remove your mask and snorkel and get out of the water.
Do not use this product if you have cardiovascular or respiratory problems (lung infection, angina, asthma, hypertension, heart disease, etc.). If in doubt, consult your doctor.