With all garments please take care.
Although many of the garments have been manufactured to be decorated, to ensure longevity of the design please wash inside out and with similar weight fabrics. (If you wash a t-shirt with a pair of jeans, the t-shirt will suffer from excessive stress.)
I always recommend washing at 30oC.
Once washed and before dry, pull or stretch and reshape the garment.
Try not to tumble dry, if necessary please do so on a delicate setting.
Never iron on the design.
Enjoy your garment, the print will last as long as the t-shirt with good care.