Price.

Given Instructions are ALL WRONG. The Inflatable pontoons need to be positioned PERFECTLY or else you''''ll have problems with the inflator tube. The FIRST thing you want to inflate in this tube is the back rest, Make sure it fills the entire compartment. Dont worry if its not rigid. Now go ahead and inflate the large pontoons. Once finished the back rest will be fully inflated. What happens is that the you can''''t manuver a fully inflated backrest bladder in while the pontoons are full

This is actually for the Cassic IV. Over all it was and still is a great entry level Tube for me. However, be very aware of the maximum weight that this tube can carry. You start to sink and what not.

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