That means you put it on a hanger and you should have a hook on a door to let it air dry. Once they are dry it's safe to tumble them in the dryer to get out the wrinkles.
My wife trusts me enough to know what I can't dry of hers and I do have some heavy shirts I don't want dried in case they shrink.
My dress shirts go to a dry cleaner since starch is a must.
The cleaning labels are much too small for me to examine them.
New Year's Day--Now is the accepted time to make your regular annual good resolutions. Next week you can begin paving hell with them as usual. - Mark Twain