Tie Dyed Shop - Grumpy Cat Tie Dye Christmas Shirt - Small to 5X 100% medium weight cotton and pre-shrunk. Will last a long time with cold water washings. We use pfd (cotton) stitching which absorbs the dye also. Some vendors use cheaper lightweight shirts with nylon stitching which does not absorb the dye. Adult sizes small to 5X are normally in stock.