07-07-2018, 10:13 PM
One advantage of that Cumberland is that it has Boston inflation valves, which are like my o d c420. If the inflation nipples are within Arm's Reach, you can use a mouth tube to top off the pressure even while on the water. You cannot go over the maximum pressure because the maximum pressure from normal healthy humans is about 2 PSI. Which is below the 2.5 PSI maximum for these kinds of tubes. So you avoid the hassle of having to go back to Shore and use your pump because of shrinkage in colder water.
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