Avoid using bleach or fabric softeners, as these can damage the fabric and cause fading. When storing your sweatshirts, it's important to fold them neatly and avoid hanging them, as hanging can cause stretching and misshaping. Keep them in a cool, dry place to avoid any damage from dampness or humidity. Additionally, if you notice any pilling on your sweatshirt, you can remove it using a sweater shaver or pumice stone.