First of all, make sure that the suit is dry.
Ensure that the zipper is open in order to reduce strain on the zipper teeth before storing the suit.
Lay the dry suit on its back on the floor. Turn the feet of the suit in towards each other, and roll the suit from the boots up. Fold the sleeves loosely across the body. Place the suit in the bag supplied with the suit, and store in a cool dry place, away from sunlight and away from devices that produce ozone, such as electric motors, heaters, radiators, compressors etc. Ozone will dramatically shorten the life of latex seals, and may affect the rubber suit material. Extreme cold will cause latex seals to become brittle.
Never store your rubber suit on a hanger.