Mask fit and clearing, revisited
A well-fitted mask that you can clear calmly is one of the quietest confidence builders in diving. A few minutes of attention before and during the dive prevents most leaks.
Practise clearing in controlled conditions first
Learn and rehearse mask removal and clearing with a qualified instructor in shallow, controlled water before relying on the skill elsewhere. Never dive with a mask you have not tested for fit and seal.
Fit before you buy
A mask seals by resting gently on the face, not by strap tension. Press it to your face without the strap and inhale slightly through the nose; it should stay in place on suction alone. Facial hair, hair strands under the skirt and an incorrect size are common causes of persistent leaks.
Try several models if you can, including low-volume designs that are easier to clear. A mask that fits a friend well may not fit you; buy for your own face, not for a recommendation alone.
Before the dive
Clean a new mask’s lens according to the manufacturer’s instructions to remove manufacturing residue that causes fogging. Anti-fog solution, applied and rinsed correctly, helps much more than spit on a dirty lens.
Check the strap and buckle for wear and set it snug but not tight. A mask strap pulled too tight distorts the skirt and often causes the very leak it is meant to prevent.
Clearing calmly underwater
If water enters, resist the urge to surface immediately. Tilt the head back slightly, press the top of the frame against the forehead and exhale steadily through the nose to push the water out through the bottom edge.
Practise full removal and replacement only within your training and comfort level, under supervision. Staying calm and breathing continuously through the regulator is more important than speed.
Dive-day checklist
Before you descend
- Test mask seal by suction without the strap
- Check for hair or stray strap caught under the skirt
- Apply anti-fog treatment correctly
- Set the strap snug, not overtightened
- Rehearse clearing in shallow water if it has been a while
General guidance only. Follow your training, the dive operator’s procedures, and each manufacturer’s current instructions.
Ask the dive guide
Personal guidance for your next dive
Describe a dive scenario or an equipment-care question. The guide answers in your language and points you to relevant journal articles.
General educational guidance only. It is not medical advice, emergency instruction or a replacement for training, certification, manufacturer instructions, your operator's briefing or your dive plan.