Sleeping Air Bag:

With higher and higher living standard, we pay more attention to funny, and play on water is one of them. Before people usually use buoy or life ring , or normal airbeds, but normal airbeds are too big, and not easy to inflate; Buoy is too small, not funny enough. 
That is why our Sleeping Bag (Hangout) is getting more and more popular, small(without air), easy to bring; big(with air), just sleep with it on the beach, start to enjoy your casual life...