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 protective masks Следующая тема
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Horace Dutt

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СообщениеДобавлено: Чт Апр 22, 2021 6:34 am Ответить с цитатойВернуться к началу

How should a mask fit? This is a question that has protective masks lots of answers. First, try the mask on without the strap. Place the mask on your face and inhale through your nose very lightly. You should feel an even seal around the perimeter of the mask, with no air leaking through the mask at any point. Be especially cautious of the areas next to your eyes and under your nose, where lots of folks have some little lines or creases that can prevent a mask from sealing properly. Once you're satisfied the mask fit without the strap, go ahead and place the mask on with the strap. Is there any discomfort......do you feel any air leaking when you try to inhale?Let's talk about styles now.

There a lots of different styles on the market today....single lens designs, twin lens, three lens and even four lens designs. As you move up in the number of lenses, the internal volume 32 degrees face mask of the mask (the amount of air space inside the mask) tends to increase. This has both advantages and disadvantages. The advantage is that you will get better peripheral vision from a multi-window mask. The downside is that if the mask leaks somewhat it requires more effort to clear the water out of 3m face mask the mask. A great feature for snorkelers is a purge valve mask. This type of mask has a small one-way valve that will allow the wearer to purge or remove the water from the mask without lifting the face from the water.

All that is required is to hold the entire mask firmly against your face, and blow through your nose, keeping the purge valve at the lowest point of ther mask. This design saves energy and allows the wearer to keep their face in the water. In it's most basic form, a snorkel is nothing more than a tube that allows you to breathe with 3m n95 mask in stock your face underwater. The things to look for in a snorkel are a large diameter tube, allowing air to pass freely through the snorkel, and some type of purge valve system, which lets you use the force of gravity to help you move water down through the snorkel, rather than up against the force of gravity.

Test the fit by gently moving your head and it should remain in place if you gently try and pull it away from your face. At the end of this test you will have determined whether a scuba mask fits your face well or not, so now it is time to examine other features. StyleMost masks on the market today have low internal volume, which means that the mask is more comfortable to use since the diver won't experience much mask squeeze during the dive. This style of mask is now usual and features a pocket for the nose that protrudes forward of the lenses and as well as low volume the large lenses allow for a wider field of view, but models to look for include Cressi Big-Eyes, although it is not suitable for all face shapes.

Often you'll see a second skirt inside the upper edge of the skirt that allows a better seal. Its absence at the bottom antibacterial fabric spray is to allow water to drain more easily from inside the mask.StrapThere are many occasions when you'll need to adjust your mask strap and so ensure that you find the mask easy to adjust. If you wear gloves when diving then make sure you can adjust it quickly and easily with gloves on. And while on the subject of mask straps, remember to always carry a spare – it is one of the more common equipment failures and the lack of a spare may mean you have to remain on [img]https://www.restauranteamaria.com/images/u/antibacterial fabric spray-390bpv.jpg[/img] the boat when everyone else is enjoying the submarine world.
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