Regulators used in water temperatures below 50° F (10° C) do run the risk of ice formation in the first stage due to the cooling caused by the rapid expansion of air from the tank. This risk increases as breathing rate increases. To prevent freezing from occurring, it is necessary to exclude water from the first stage mechanism. Many of the methods that have been used to do this, such as packing grease around the piston in piston designs, various air bleeds, and add on devices, are messy, subject to contamination, or unreliable. We use a simple "dry sealed" design that requires absolutely no attention from the user.
Even if you don't dive in cold water, our environmental seal helps to keep your first stage functioning at peak performance by keeping sand, salt, and other contaminants out of the internal mechanism.
NOTE: Special training and procedures are necessary whenever diving in cold water environments.