For about the same money as Belly tubes as there called here, one person injection molded kayaks can be had. Feel they're far superiour, need maybe 10 cm of water to float, has tremendous gear storage capabilties, can be easily manuvered one-handed with sculling paddle, can be camo'd by simply inter-weaving native brush and grass, plus pretty much no chance at all of ANY turtle latching onto tootsies.