Make sure your suit is aired-out and clean before putting it away. Herewith, some long-term storage tips.
Invest in a hanger
Your jacket may have come with a plastic hanger, but you should spring for a well-made wooden suit hanger. These have a substantial shape to the shoulder and arch forward slightly, which supports and maintains the shape of your jacket’s.
Cover it up
Your suit does not need to be bagged. And it certainly does not need to kept zipped up in an air tight plastic bag. But if you are worried about dust, pests or other closet debris, then a canvas garment bag will keep your suit clean while letting it breathe, which is good for both cotton and wool fabrics.
Keep pants wrinkle free
The last thing you want, is to pull out your suit and find that your pants have been rumpled at the bottom of that suit bag for the past three months. If you are not keeping your suit in a bag, felted clamp hangers (clamped at the hem of the pants) will ensure a smooth finish.
If you are keeping your suit together in a bag, then employ the “Savile Row fold.” Developed decades ago by London’s best suit tailors. Grab the pants by the legs and fold one through the hanger until the hem reaches the crotch.
Finish by folding the second leg similarly over the first.