Deflate it using the middle ring on each valve, fold it in half into a semicircle, fold the ends in to the length of the bag, then roll it towards the bag. Pack it dry if you can.
Steps
Undo the middle ring on the valves to let the air out.
Fold the whole tent in half into a semicircle.
Fold each end of the long, straight edge inwards by equal amounts, until the straight edge is the same length as the bag.
Roll everything towards the bag.
Place the bag upside down over the top, flip it over and zip it up.
