This is a quality product but not for use in a pool, swimming or snow. When inflated, the full circle is about 25 inches in diameter, the tube itself is only 5 inches wide, and the center hole is about 15 inches. A good water or snow pipe should be much thicker with a smaller bore. I'm pretty sure it's ok to use on a bus. The inner opening is too large to accommodate all but the largest adult and the air volume cannot support an adult. For water or snow, get a donut-shaped tube - it's closer to a bike tire. 1920's Model T tube or tire
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