PRO-EAR MASK

Product Description

The IST Pro-Ear Mask is manufactured to the highest standard and only the best materials are used. It is designed to counter most of the unavoidable effects pressure and water have on the ears so you can have more enjoyable bottom time.

• A: Optical Lenses:

Prescription lenses are available in diopters from -1.0 to -8.0 in -0.5 decrements.

• B: Skirt

Made from the best grade of crystal clear, hypoallergenic silicone, the skirt is soft and automatically conforms to a wide range of facial profiles.

• C: Silicone Strap

Mounted on swivel buckles, the strap with its large contact surface secures the mask to the wearer.

• D: Ear Covers

The soft silicone Ear Covers forms a water tight seal between the ear drum and the cover. The pressure buffer created to have the same pressure as your nasal cavity mask when air exhaled through the nose is introduced through the Equalization Tubes. Therefore the ear pressure in the middle and outer area is the same and the “squeeze” from the ambient pressure will be significantly reduced. Other benefits of keeping the ears sealed include reduced chance of ear infections from the water, plus an improved sense of direction and warmth retention.

• E: Equalizing Tubes

With a one-way valve placed inside each tube, air is allowed to travel only from the mask to the ear covers for pressure equalization and water clearance while stopping water from flooding the mask in the unlikely event of flooded Ear Covers.

Benefits:

．Pressure equalization is achieved more easily!

．Prevents pressure induced ear ache (barotrauma)

．Enhanced underwater hearing and sense of direction

．Stops dirty / polluted water from entering the ear possibly causing infection

．Increased warmth around the ear in cold conditions

PRO-EAR FUNCTION

The squeeze we feel during a dive is caused by the imbalance of pressure either side of the ear drum. While our ear canal is exposed to water and ambient pressure, our middle ear (which is on the other side of the ear drum and is connected to our nasal cavity by Eustachian tube) is still filled with air and experiences less pressure. The greater external force is able to push our ear drum inward, causing discomfort or pain.

With the Pro-Ear Mask, the ears are completed sealed off from the outside and air, at the same pressure as your nasal cavity, is able to be introduced through the Equalisation Tubes into the Ear Covers. Therefore the pressure on both sides of the ear drum becomes equal.

So as pressure and depth increase, the simple act of breathing air into your Ear Covers can significantly improve your enjoyment of diving.

CODE: ME80