Single blow up mattress for repurposing (Horspath OX33)

Hi, integrated pump works and this inflates nicely, but slowly looses air overtime - not sure if this is via the pump mechanism or a small leak. Could possibly be fixed or repurposed as a ground sheet or in other ways - lots of ideas on the net. Thought it might be of some use to a homeless charity, but quite bulky to move around. Collect Horspath village.