IST Pro Ear Mask RX008 Lenses Available

Quick answer: The IST Pro Ear is a scuba and snorkeling mask with watertight ear cups connected by a tube and seal system. When you exhale into the mask, the system equalizes the air pressure in the ear cups automatically. IST says it helps prevent pressure-related ear pain and improves underwater hearing and sense of direction.

Who it's for

If ear discomfort, ear squeeze or recurring wet ears keep you from enjoying your dives, the Pro Ear is worth a look. The ear cups keep water out of your ears, which also helps keep them warmer. It doesn't replace equalizing your middle ears normally, and if you have an ongoing ear problem, talk to your doctor before diving.

Fit notes for bigger divers

Because the ear cups must seal around your ears as well as the mask on your face, fit matters more here than with a standard mask. Check that the cups line up and seal comfortably with your head shape before your first dive. IST doesn't publish a size rating.

If you wear glasses

Optical prescription lenses are available (IST RX008). Prescription lenses usually add a few days of processing, and used lenses generally can't be returned, so check the retailer's details first.

What you get

• Watertight ear cups
• Tube and seal system that equalizes ear-cup pressure as you exhale into the mask
• Enhanced underwater hearing and sense of direction
• Optional prescription lenses (RX008)

Before you buy

Hold it to your face without the strap and breathe in gently through your nose. It should stay put without pressure at your temples or nose pocket. Read How to Fit a Dive Mask. More options: Wide-Fit Scuba Masks for Larger Faces.