Check your air pump or the instruction sheet that may have come with your mattress or air bed. Some pumps have a ‘deflate’ option that rapidly deflates your mattress. If not, then remove the cap of the air valve on the mattress and push down to listen for escaping air. If this allows air to escape than walk along the mattress carefully to completely deflate it. When largely deflated, start rolling it up slowly from one and remove the rest of the air. Bind the rolled up mattress with a cord, or insert into a bag to prevent it from unrolling during transport.