When you wear these men's T-shirts from the 'Highway to Asgard' collection, just put them on like any regular shirt. For washing, turn them inside out and put them in the washing machine with cold water and clothes of similar colors. Only use non - chlorine bleach if it's really necessary. After washing, it's best to hang them to dry. But if you're in a hurry, you can tumble dry them on a cool or low - heat setting. Remember, fabric softener can make the colors fade, so don't use it. Also, don't iron or dry clean these shirts to keep them in good condition.