Please do not store in a plastic bag as that can imprint onto the vinyl / PVC.
Also please do not store next to or pack with vivid colour garment where there is moisture. The moisture can imprint the colour of the fabric onto the vinyl. It is especially important to avoid black garments as all black cloths release colour. When packing in luggage my advice is that you pack our pieces wrapped in a white T shirt or similar colour garment. If warping happens from being in a suitcase or extreme temperature, please allow the pieces to lay flat or hang on a hanger at room temperature for them to recover their original shape.