All of my products are printed using either DTG or DTF technology. I use whichever method is best for the garment and graphic selected. DTG technology uses a water based ink that is printed directly onto the garment with a special DTG printer. Afterwhich the ink is cured with a heat press. The DTF prints are created using my DTG printers but instead of printing directly onto the shirt, I print onto a DTF transfer sheet. I then use that sheet to heatpress the graphic onto the garment. There are no special instructions for washing. You can wash any of the prints in the washer and you can run through the dryer too! These unisex sweatshirts are a must have in your wardrobe. They are incredibly soft and comfortable. I know you will love it! The sweatshirts I use are either Gildan, Hanes or Jerzees depending on stock and availability. They are all made of 50% Cotton and 50% Poly and are all a very similar fit. These sweatshirts have created some incredibly happy customers! If you have ANY questions just send me a message! Order Today!