One of the most common places for clothes to fold and crease is near your bottom and thighs when you sit. The fabric may get folded and permanently crease after you stand up.For dresses or dress shirts, pull down slightly on the tail when you sit so you are sitting on it flat, as opposed to pressing wrinkles into it with your body.
In the car, unbutton the bottom button of your shirt and lay it over the lap belt. This will help prevent creasing along the area where your seat belt rests.
 If you are in the habit of crossing your legs when you sit, be careful, as it will crease your pants. Just like when you sit, crossing your legs creates small folds in the fabric of your clothes that press down to create creases and wrinkles. Try sitting with your legs uncrossed on days you are avoiding creases.


When you are sitting at a desk or table, if space permits, stretch your legs out and keep them outstretched., The more contact and pressure your clothing receives, the more it will crease. Try to let your clothing hang loose and not be pressed up against your body by your hands, folded arms, bags, or jacket for long periods of time.
 If you are at a party or other event where sitting is not required, stay standing. Sitting is mostly responsible for pant creases in the legs and the seat. If you are able to stand, you will minimize the opportunities for your trousers or dress to wrinkle.
Pull your clothes flat when you sit.
Avoid crossing your legs.
Don't put pressure on your clothes.
Stand as much as possible.
{"src": "wikihow-all_validation", "title": "How to Avoid Clothes Creasing During Wear2"}