Proper Snorkeling guide
Be sure the mask fits your face. Hold the snorkel mask up to your face clearing the strap from your face. Breath in through your nose. The mask should seal perfectly and stay on, without holding it, for as long as you breath in. If any air leaks in, water will also. Keep all hair out of the seal, if you have a mustache, use a good glob of Vaseline, sunscreen or chap-stick below your nose to act as a “gasket,” or consider shaving the area right below the nose.
The strap should only fit snugly at the widest part of your head, towards the top of the back of your head. If it’s at the base of your skull, water may seep in. If water does start seeping in while snorkeling, reach back and see if your strap has slipped down. Don’t tighten the strap beyond “snug,” being too tight causes leaking, as the seal can be broken. The pressure of the water will help seal the mask to your face. The snorkel should rest in front of your ear.
Choose fins that are snug but not too tight. If they hurt or curl your toes especially, you may develop cramps while snorkeling. If they slip off your heels, they’re too big. Better a little big than too small. Remember they will slip on easier when your feet are wet.
There are a few methods of defogging your mask. We do have mask defog on the boat which works. Alternative methods of defogging your mask are rubbing a little spit on your mask or using Johnson’s baby shampoo to rub on the inside of the mask. Always rinse with ocean water after.