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Exploring the world under the sea is always fascinating. But to move freely underwater is not so easy as to move on the land. To be alive under water one has to carry a tank full of oxygen as breathing is not possible under water for human being. Beside that the tremendous pressure and different temperature of the water in deeper are much more different from the land.
For Scuba (Self Contained Underwater Breathing Apparatus) diving the divers, boaters, sailors, swimmers, Water Adventurers, surface-water sports persons often use these things besides the full tank of oxygen:
Maintaining body temperature is one of the biggest problems for the divers. Dry suit is a kind of apparel, which gives the wearer protection from the water to his skin. Dry suits are used to prevent the water entering. Drysuits are used where the temperature of the water is between –20c to 150c.
There are three types of dry suits:
1. Membrane dry suits
1. Membrane drysuits - are mainly built of thin materials of vulcanized rubber or a compound of nylon and butyl rubber. These types of dry suits do not give any real thermal protection in colder water. And these dry suits do not stretch, and needed to be oversized to the joints to give the wearer flexibility at the time of movements. Sailors and boaters who are likely to be out of water prefer these membrane dry suits. Membrane dry suits are easy to wear and put off. Membrane drysuits are mostly used in the spring.
2. Neoprene drysuits - offer the thermal protection in the colder water, keep the buoyancy. Neoprene is thermal insulating material, made of heavy-duty fabric and that fabric is coated with rubber or Polyvinyl chloride better known as venyl. The neoprene dry suits are considered better in comparison to membrane dry suits. Neoprene has some better properties, which make this more useful, chemical-resistant, more stretchable buoyant and waterproof. Neoprene drysuits give greater thermal protection even if there is a leak. Neoprene drysuits are mostly used for water surface sports and in the cold water.
3. Hybrid drysuits - are made by the combination of the membrane material and neoprene material. In hybrid dry suits, the upper part of the suits is made of membrane material and the lower part starting from the waist is made of Neoprene materials. So that the tight fitting lower part of the dry suits gives the comfort to the wearers to kick the water to move a distance when they are swimming. And the loose upper part of the dry suits lets the wearer to free movement of their arms. Hybrid drysuits are mostly used for water surface sports and in the cold water and where the divers are going deeper.
Modern drysuits are having a waterproof zippers & hydro gloves. The zippers are mostly located across the shoulder lines or in the front of the torso, to wear the dry suits easily. Drysuits may have the hydrogloves, permanently attached to the drysuits or with attachment rings. Modern drysuits have the air inflation valve, which empowers the diver to control the buoyancy of the suit by injecting air from the diving regulator to get rid of squeeze under deep water. A drysuit is worn over an insulating undersuit.
A modern drysuit has an air ventilation valve, which allows the diver to release the higher-pressure air from the suit when they are coming out of the water. Ventilator valves may be automatic or manual. It is used as the pressure relief valves. Most of the automatic ventilators are located at the shoulder of the dry suits and the manual ventilators are located at the wrist.
A modern version of the two-piece drysuit is manufactured at Customworks at Idaho. These two-piece drysuits give all sorts of comfort to the divers, boaters, swimmers, sailors, cave divers and the water adventurers. They are making the drysuits considering the needs of its users.