The sea to summit jet stream pumpsack is an ingenious accordion style airbed pump that doubles up as a mattress stuff sack to minimise your pack load as a pump this pumpsack s output is the equivalent to one breath it has a soft and lightweight tpu base with a one way welded valve and finger loops to make holding your pump in place on your mattress nice and easy meaning you can pump up your airbed without getting dizzy as a stuff sack it has a roll top closure and will fit the following sea to s